XTZ Room Analyzer II Manual
Contents
1. 33 41 View There are three different curves that can be displayed in Measure PRO version only the measurement window to show different kinds of Measure information The window type used is the Half Extended s Cos Bell with 20 taper a VO ek tt oe Yee ee Anechoic No room interference 300 4 ms Multi Win ea m oF De Show Scal Shows the frequency response without room TERENA 5 interference Rr ATED Fg Ambient Room information 0 dE w 300 8 ms Ambi Win Baa Shows reflections from the room and room modes Raw Untreated 300 ms Full FFT All the information is displayed untreated This method offers the highest resolution but demands that the results can be properly evaluated in return Waterfall diagram CSD 300ms slice total length of 200ms sliding CSD 2D or 3D view can be selected where the 3D version can be viewed from three different angles In 3D view the x axis shows frequency the y axis shows the magnitude and the z axis shows time In 2D view the same information is displayed but the Y axis has been flattened out and shown only as a change in color 34 41 Overlays Volume setting Start Full Frequency measurement Only shown in Advanced mode Overlay i Shaw 2 hon 2 4 hon Room Analyzer offers the possibility to save up to 4 curves PRO version or 1 curve Standard version on the screen2. All rooms have a decay time but a very long decay time affects the sonic performance in a negative way A hard hand clap can give a rough indication of the decay time A short decay time is preferable and can be achieved by adding more absorbing materials in the room such as furniture carpets cupboards and curtains There are specialized companies that are able to assist with these kinds of room acoustic treatments but you can get far just by some well though through furniture Even in a room with a fairly flat frequency response the decay time may be a problem as frequency response is commonly measured at time zero and no respect is taken to the reflected sound Room Analyzer shows the frequency response Blue curve with a high resolution the true frequency response or the exact response down to each frequency Therefore any flaws in frequency response can be detected In Advanced Mode you can adjust the resolution smoothing in several steps Room modes are shown in green These are caused by the room and ideally the goal is to get rid of all room modes Then you have removed the largest problems of the room The calculated result White curve shows the result using DSP treatment according to the suggested PEQ parameters The RTA shows the frequency response in real time RTA shows the experienced energy with 1 3 of an octave resolution as a moving average In other words it doesn t offer the same high re
3. Scale settings The Y axis top value and range can be adjusted Frequency response measurement RTA is perfect for checking the frequency response when placing speakers subwoofer finding a good listening position or adjusting a graphical equalizer Export Exporting to XTZ DSP products can be done via the menu or using the quick buttons shown on the diagram to the right Both means that the automatically generated parameter values are exported together with the RTA values 23 41 Room Analyzer RTA IN Full Range RTA is a full range measurement Above 5 kHz the microphone is direction sensitive and should be pointed towards the sound source Scale Scale top 120 dE Scale range 100 dE The options for adjusting the Y axis scale nA test XIZ File View Setup Help CEREN NOTE For a complete room analysis you should use the Room Analyzer first then perform a RTA measurement 24 41 Start measurement Click Measure to start the measurement procedure 1 position measurement Uncheck Average 3 positions Room Mode Measurement A Instructions Move the microphone to listening position as sho Right Speaker picture Then press Measure Left Speaker Subwoofer Average 3 positions Measure al Cancel e Click Measure to start the measurement e The measurement window is closed after a short while and the results are displayed 3 position measuremen
4. 3 positions measuring can be used for e Room Analysis e Reverberation analysis Frequency response measurement FULL RANGE A full range measurement is done using a sine sweep between 20 20 0OOHz instead of the RTA method s pink noise There are options to choose between three time windows Anechoic Ambient and Raw By clicking the RT60 button the decay time for several frequencies will be displayed at the same time RT60 is shown according to the ISO3382 standard PRO version only Tone Generator The tone generator can be used in conjunction with the SPL meter or RTA analyzer to test system function and performance at specific frequencies or over the entire audible spectrum The following test signals are available Pink Noise White Noise Sine wave with frequencies 10 12 5 16 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1k 1 25k 1 6k 2k 2 5k 3 15k 4k 5k 6 3k 8k 10k 12 5k 16k and 20kHz 21 41 Room Mode Measurement a Right Speaker Left Speaker Subwoofer Mic O O OnE The three positions suggested to perform a measurement RT60 shows the amount of time for the sound pressure level to decay 60dB This is a standard method to evaluate the decay time of a room 5 PRO version only Measuring sound levels using the SPL meter and Tone Generator Your system levels can be calibrated using the SPL meter and tone generator These tools are also
5. If the level is too high or low adjust it with the volume control on the system subwoofer Small adjustments in output level can be made with the L Output Level control bar Pullen Click on STOP to turn off the white noise s H am REMEMBER HIGH SPL level can damage your ears 19 41 Suggested approach The recommended approach is in two steps to equalization Room Analyzer finds the largest and most important Step 1 Room Analyzer room modes all of them can Room modes are treated by utilizing PEQ parametric Hever beanclided acthic equalization would demand an infinite number of PEQ filters Use Room Analyzer to find the room modes A ele position measurement method If the Room Analyzer suggests the use of PEQ you need Till gget g ller endast 1 positions matning to include a PEQ in your system to be able to carry out Te ee ee the correction flat enough use the High Resolution method several times and add more PEQ Step 2 RTA Full Range filters to achieve a better After adjusting the room modes continue by adjusting Tt the frequency response in the listening position using yoy can use the function the frequency response measurement in RTA Full Manual adjustment of Range with a graphic EQ and or PEQ curves on page 29 Advanced functions Measurement There are different ways to measure the frequency methods response To select the method click on the tabs at the lower bar
6. fo Level dBFS 6 0 l 3 1 y 20 Action nest B 7 20 10 0 4 n j s JINI sa Lad G L Found Room Modes Output Level Room Mode Measurement ao z ETT e Instructions Modes EQ Measured S picture Right Speaker Then press Measure i Modes smooth Meas seth 4 A 3 iti F J iSite a ioni Stimulus EQ 12ppo v Mic Use f Hz Q G dB my C t ms 45 0 Place the microphone to the left in the room as shown in the B Result smooth 12 ppo x Left Speaker Subwoofer Measure Overlay 4 3 Sho Clear Stimulus EQ Copy Room Modes 4 Fast 1 25ms v Weighting v Ss Room Analyzer RTA Full Range Time 238 5ms Freq 147 89Hz Mag Device XTZ Audio v2 Std 12 41 Room Analyzer Shows the frequency response Blue curve room modes Green curve and calculated result curve White curve RTA Real Time Analyzer Measures frequency response in real time with a resolution of 1 3 octave Spectrogram PRO version only Presents an analysis of the decay time in the room The time spectrum analysis shows a color spectrum of frequency level and time You can switch the main window display between frequency response and spectrogram by double clicking on the main window Select the curve to be displayed by checking or unchecking the relevant boxes Modes EG iV Measured Full Range Room Analyzet RTA a Full Range BIH
7. This chapter contains general information about loudspeaker placement and installation These are general rules so there may be exceptions Regardless how good the equipment is in the wrong listening environment it will inevitably sound poor There are some basic rules concerning proper loudspeaker installation Carpets curtains and soft furniture absorb midrange and high frequency sounds and this is preferable Big empty areas on the contrary produce hard reflections that may lead to a blurry dialogue Apart from coloring the sound the perspective of the sound will also deteriorate Reflections from the room can roughly be compared to the reflections that cause ghost pictures on a TV screen When a loudspeaker is placed near a wall ceiling or floor lower frequencies will be amplified in a sometimes not desirable way since it may lead to indistinct sound reproduction This amplification becomes even more obvious if the loudspeaker is placed near a corner Thus for a sound as clear as possible the loudspeaker should be placed at least 30 cm about 12 inch away from the wall Be aware that furniture may vibrate creating disturbing sounds and rattles at loud levels Quadratic rooms or rooms where the length is exactly twice as long as the width should be avoided since they may create unwanted resonances The way the loudspeakers are placed towards the listener is of great importance In order to get the best results t
8. red This explains why the frequency response might look uneven at time zero in spite of PEQ or GEQ correction The other way around a dead flat frequency response at time zero may not be at all optimal as interference may occur later in time affecting the listening impression For this reason the decay time is of great importance The experienced frequency response is the sum of the energy over time something the RTA can display 32 41 BIQ Properties Properties Freg Hz E Q 18 0 Gain dB 6 19 Cancel PEQ suggestions cannot be imported to XTZ DSP products as the new values overwrite the previous ones They have to be added manually Full Range Working areas The Full Range tab displays the tools to make full range frequency response measurement When measurements in the room have been made you can select a variety of presentation options to enable you to analyze the information in the best possible way Below is an example of a frequency response and waterfall diagram in 3D 3D view available in PRO version only displaying data in the time domain 0 200 ms Full Range measurements can also be used to measure the room itself It offers higher resolution than RTA but not the same resolution as the Room Analyzer in the bass area The Full Range screen has a divided working area You can adjust the size of the two parts by clicking on the grey space between them and dragging up or down
9. useful for monitoring sound pressure levels produced by your system To make a measurement which as closely as possible resembles how the sound pressure is perceived by the ear Choose Fast in the top menu and A weighting for low SPL levels or C weighting high SPL levels Set the volume of the function generator below 40dBFS to protect your equipment Choose signal type by right clicking the fg butting Start the signal by clicking the green fg button 22 41 RTA Real Time Analyzer Click on the RTA tab Click Measure to start the measurement and stop it by clicking Paused Each bar displays the sound pressure level SPL for fixed frequency bands Below the bar diagram you can see the SPL at each frequency as a number The RTA shows the frequency response in real time It measures the energy level at different frequencies in the room It is therefore common for the curve to differ from the sweep measurement RTA shows the measured energy with 1 3 octave resolution and as a continuous moving average average in a short time frame It doesn t have the same high resolution as Room Analyzer or the Full Range measurement but still gives a good picture of how the sound will be experienced Click Listen to activate the listening mode This mode is suitable when you want to monitor the sound changes in the room in real time but less suitable for adjustments The scale can be altered using the
10. E Jii a JJ s nmmn at uw u Aa gi s 2 a p amp ia iF rift ja ii Shows the frequency response from the measurement Display alternatives available are Anechoic Ambient and Raw Waterfall diagram can be displayed in 3D PRO version only and 2D Output level The signal level can be adjusted using the slide control to the right The signal level should be green L Red Too High Output Level Green Good level Blue Too Low Measure Start a measurement Acton Start the measurement by clicking the Measure button Meas Measurement window Room Analyzer Room Mode Measurement Instructions Move the microphone to the listening position as shown in the picture Left Speaker Right Speaker Then press Measure Subwoofer Average 3 positions lt Ced Cancel 1 position method 14 41 10 With the Average 3 positions unchecked a one position measurement is performed Room Mode Measurement Instructions Place the microphone to the left in the room as shown in the picture Left Speaker Right Speaker f Then press Measure Mic Subwoofer O V Average 3 positions O Mic CERE oa Cancel 3 positon method Average 3 positions gives you an average result calculated and measured at three positions in the room Room Modes In this window all found room modes are displayed together with the reeommend
11. This is done by clicking on 1 2 3 or 4 in the Overlay area It is always the last measurement that is saved To store a new curve simply do a new measurement and click the Overlay button you want to replace To hide or show a curve use the Show button Overlay i raw BETE 2 Grow 4 Show a The picture shows that curve 1 and 3 are active The volume of the signal sent to your system can be Wigant adjusted with the Output Level slide bar A higher volume achieves better accuracy Remember b not to exceed your systems limits r 6 L Output Level The measurement is started by clicking the Measure button Four sine sweeps follow and the measurement is done This gives you a variety of information First the frequency response with different window settings a waterfall chart showing the measurement in respect to time and finally RT60 values These are displayed as bars where the decay time values are visible above each bar This is done according to ISO 3382 standard Evaluating the results perfectly takes experience and 35 41 Delay Alignment knowledge but most of it can be interpreted relatively easy Measurements performed at longer distance often present dips in the bass region The cause is heavy room influence microphone and speaker placement To see how a bass speaker or subwoofer really performs you need to do a near field measurement to avoid the room to influence the r
12. VD LD Example of how the amplifier inputs might look Select a free one for example DVD LD Placing the microphone If the Room Analyzer is to be connected to stereo system then you should use the splitter to feed a signal to both channels This should be connected to any input that is free to use such as a AUX TV input When making final adjustments make sure signal is applied to all speakers and subwoofers in the system you wish to calibrate Making separate adjustments to each channel will not accomplish a well balanced end result High resolution room analysis Room Analyzer While doing room analysis the microphone should be placed in about listening position at ear height 70 cm 110 cm from the floor Frequency response measurement RTA Full Range While doing full range measurements the microphone should be pointed towards the speaker preferably at the same height as the tweeter the microphone is directionally sensitive above 5 kHz 11 41 Working area In the following section the functions marked on the screen shot below are explained Every function is represented by a number in the picture below and is explained thoroughly on the following pages Some functions are restricted to the PRO version of the XTZ Room Analyzer II software Functions that have been reserved for the PRO version are hereafter labeled PRO version only WS untitled XTZ Room Analyzer Pro File View Setup Help D oo amp l
13. XTZ ROOM ANALYZER II H PRO Measurement software for room analysis and frequency response car manila SQ O BPE Pea iF wi Ci Oren Vw aes Ww FE E E E WU i FE Vi US SG 2011 XTZ AB www xtz se PRET OOM C UI OM easter ed ei sariasa a a a ads bres a oeetossouseseesapeetimneneuess 3 TOU DTZ hae recedes Aaah he an aha tales teat a dace T E T 4 Technical Ove IEW asclasicestccctccleaeneesastans eA tel As vaste see verdana huss sics a tebadesadautecees a vos ee a 5 UAC NS stresses ettesteect E etal teed ah eels nerve ats ae N 7 Basics of sound installation and placement tips cceccesssssessssssssnsccccceeeceeceesssssssnsanaaceceeeceeeeeceeeeeeeessessengees 8 Sotware mstallatnionmand Connections A A A A N 10 PUT CHOM PCTCT CICS oaa N a EN NEE O E A 12 PTEE TIS N ETE E TANS OAEIAE S EE PETENTE A EIIE ETETA E AA OAA E A EIEEE TIEN OA AN TEE 19 IVC AS UE MIM gesn E a E nasa catedanethae a elauaemie 20 Prequency response measurement RTA sandrad ae Eaa i E A A aaa a i EEE 23 High resolution room analysis Room AnalyZer ccccccccccsssssssssssssssscnnceccccccccccceeeesssssssaaeceeeeeeeeeeeeeseeeeeesessenees 25 Measurement results Frequency FeSPONSE ssssscssscccceccccceeesesseeeessssnsssnecaaeceeeecceeeeessesssseanaaeeeeeececeeeeeeeeeeees 27 PROVES ION ON ieren othe tee diee ET teow detse E an aces aah desaudeduastuceduataxdetuore hustes OOE 29 Measurement result Spectro FAN uenea nea EE E N N ERE
14. dually This is Made smooth very powerful when comparing different settings and systematically working ones way towards the optimum settings The charts are displayed or hidden by clicking on Show Overlay PRO version supports 4 overlay positions 2 Show 2 while Standard version allows for 1 overlay position 2 Show 4 Only shown in advanced mode Export buttons Export ROOM RTA or ROOM RTA to XTZ DSP MA test XTZ products In order to utilize this function additional software is necessary to download the exported file to the XTZ DSP equipment Tone generator PRO version only The tone generator is started by pushing the green fg button Right clicking the fg button displays a menu Per Level dBFS 6 0 allowing the user to choose between 10Hz 20kHz sine wave tones or white pink noise The signal level can be adjusted between 100 OdBFS using the arrows or by typing in a value SPL meter The SPL meter Sound Pressure Level meter shows present sound pressure at the microphone position The meter displays five different top and average levels as follows top to bottom LCpk hold shows the highest SPL since start reset LCpeak shows continuous peak levels including short bursts Which values currently displayed on the bottom three indicators can be adjusted using the menus under the meter bar The top menu allows for switching between Fast or Slow average 125ms or 1s This is sh
15. eae 29 Measurement results Found ROOM Modes ce eeesescscccccsessscccccceessesccccccsecesscccscessccesecesecessccsseeueccssesseeeees 30 Advanced TMACHONS IMs ROOMLATIA IY ZO ssaalssansosdsecascalecattsnatses T T A a pee 32 Frequency Measurement FUN RANG Goyaren S aaa tac bladoa busied Sesiiun Cia ea eaeees 33 KT GO Decay NE sexs sensenesauaianss T A 37 Technical terms and concepts explanations esesseeeeeesssssssssssseeeeeeeeccceeesssssssssseeeoseeessssssssssseeeeeeeeceeeeeessssssssssseeee 37 PECHIMICA SPCC CALIONS ena a E eens 41 SEVICE OCSUP DOLL eeren r E E N E T N O A 41 2 41 Introduction Congratulations on your purchase of the XTZ Room Analyzer The XTZ Room Analyzer offers many possibilities in guiding you to calibrate and analyze your hifi or home theater system Please read the manual carefully before using the Room Analyzer to get the best benefits from this product It takes patience to get a hifi system or home theater system carefully optimized This manual provides the basic tools to measure and analyze your systems performance Please feel free to contact our free of charge support if you lack experience of acoustical measurements or have any questions see Support info on the last page of the user manual for contact details WARNING The microphone supplied with this product is designed solely for use together with the supplied sound card referred to as connection box in this man
16. easurement the sound level output must loud enough for the program to discern the signal from the natural noise floor which can be around 40 50 dB in a regular room Ideally measurements should be made at a sound pressure level of at least 90d B 0 a To calculate RT60 the signal level change of 60 dB is divided by the time it takes for the level to drop The decay time is presented in octaves between 125 Hz and 4000 Hz At frequencies below 125 Hz the results are inaccurate and above 4000 Hz air absorption becomes the key limit 37 41 Show Scale range Beau Raw Room modes Phase cancellation Peaks Dips 1 position measurement 3 positionsmatning Average 3 positions Decay time Room modes occur as the result of reflected sound in the room Direct sound and reflected sound form a pattern and where the waves end up in phase the room modes are found If a direct sound wave is in phase are in anti phase they cancel out and you get a room node which in many cases can be better than a room mode If several waves are in phase or anti phase peaks or dips form If extreme dips are found during a measurement these can be impossible to compensate for and a change of listening position or speaker placement should be considered A node is shown as a dip in the Room Analyzer measurement If you want to optimize the sound without compromise the single position method should be used which can be su
17. ed compensation parameters calculated for use with XTZ DSP products or similar products using Parametric EQ Smoothing PRO version only Smoothing is a way of evening out the result chart This can be done using different resolutions This is an act of balance depending on the equipment used but also your individual choice Resolutions available are 2 ppo 3 ppo and 6 ppo points per octave Stimulus EQ PRO version only Room Analyzer provides you with recommended parameters for use in a Parametric Equalizer These values can be moved to the Stimulus EQwindow by pressing the Copy Room Modes and a new measurement will be completed that emulates the use of a PEQ 15 41 The picture shows all the positions displayed after one another during a measurement Gubsit Level Found Foon Modes Use WHI Q GUB Tae p ppa M1 s4 i00 000 EQ Nites we 104 10 0 10 00 EQ W Mesaer mverages 4 iE Menit smagt pp Medes erocoth apne r Us Ha 8 3 uB bass tooth mi nAverages 0de Result smooth 6 ppo Modes smooth 6 ppa Meas smooth E ppo Stimilus EQ Only visible in Advanced Mode Stimulus EQ Use F Hz Q G dB 54 11 0 19 00 104 10 5 10 50 11 12 13 14 Overlay Full Range Provides an option to save and view measured jioso charts on the screen Up to 4 charts can be stored aE and displayed simultaneously indivi
18. esults The Alignment function in the Full Range view is a tool to adjust the time delay between your systems Alignment channels subwoofer Better phase accuracy at the listening position is accomplished by delaying individual dusha channels separately Auto Align How to perform a time delay measurement between your speakers and subwoofer 1 Place the microphone at the listening position The microphone position must remain unchanged for all measurements 2 Make a measurement applying signal only through one of front or surround speakers 3 Press Overlay button 1 4 Make a measurement applying signal only through your subwoofer 5 Press Align Delay Controls for aligning the delay manually are now displayed if you wish to do so 6 Press Auto Align The time with which your lbs Peeia signal needs to be delayed is now shown in the time window to the right of the controls If your system doesn t allow for signal delay you may reposition your subwoofer by the distance suggested in brackets in the time delay window 36 41 Measurement window Decay time or reverberation One of the room s most important parameters is the decay time T RT60 shows how long it takes for the reflected sound to fall 60 dB below the direct non reflected sounds original level and is a standard way of measuring the rooms decay time measured with 1 octave resolution In order to achieve an accurate RT60 m
19. f PEQ Parametric Equalizer The analysis render following areas of use e Give exact values for compensation for the room modes to a subwoofer with PEQ e While adjusting placements of speakers subwoofers e While optimizing the room with absorbents diffusers sound traps and more 5 41 e Measuring speakers subwoofers Computer The system is based on PC technology Minimum system requirements P3 1 GHz l System demands are Wing8se or later because of the pedis resolution 256 fi B a support ori Windows XP 512MB ram Windows 98 Me 2K 256MB ram Microphone The microphone is manufactured to match our requirements and the software has built in corrections for the deviations in frequency response Software The software is specially designed for XTZ by a well http www xtz se established audio software company The software can be downloaded from our website Size 1 Mb 6 41 Unpacking Included items Check that the items below are included in the package Room Analyzer II 1 Goose neck microphone 1 Connection base 1 XLR to RCA audio cable 1 Y split cable Room Analyzer II PRO 1 Microphone 1 Microphone stand 1 Connection aluminium box 1 XLR to XLR audio cable 1 XLR to RCA audio cable 1 Y split cable 7 41 In which room do you achieve the best sound Reflection absorbtion Amplification of bass frequencies Furniture Room dimensions Speaker placement Front speakers Angling
20. he front speakers should be placed symmetrically in front of the listener The distance between the front speakers should be about 80 of the distance to the listener In other words the recommended angle between the front speakers should be 45 degrees You can place the loudspeakers angled in towards the listener or straight ahead By angling the loudspeakers inwards you decrease unwanted reflections enhancing the stereo perspective 8 41 Correct height Cables Background noise Finally If the loudspeakers are small they should be placed on stands or tilted so that they are on the same level as the ears Some speakers have other recommendations from the manufacturer in that case follow those Try to keep cables as short as possible By its electrical properties a long conductor will have more influence on the sound than a short one It may also work as an antenna receiving various signals that may become a constant noise in an active subwoofer Make sure that all connections are clean and not oxidized All connections should be mechanically stable both power signal and loudspeaker cables Signal cables should be separated from other cables Important External noise from trucks train traffic etc can easily disturb the measurement process If the measurement result looks strange in any way you should do the same procedure again once or maybe twice If you get the same result again you can be sure that
21. in the program See the picture to the right Floom Analyzer las RTA j Full Range 1 Frequency response measurement RTA Measurement range is 16 20 OO0OHz A simpler way showing the response throughout the entire audible range The resolution in this option is 1 3 octave 2 High resolution room analysis Room Analyzer Measurement range is 16 250Hz In Room Analyzer Pro there are two ways for the high resolution method 1 or 3 position measurement 1 position measurement For optimizing the sound without compromise Pereme a 1 position measurement should be used Examples of when to use this mode include a stereo or home theater with only one seat that you care about Left Speaker Subwoofer Right Speaker The risk with 1 position measurement is that the sweet spot could be in a room mode or boundary intereference related dip Sometimes it is impossible to compensate for these dips without causing other problems One solution is to move the listening or speaker subwoofer position Mic C One position measurement 20 41 1 position measurement can be used with the following measurements e Room Analysis e Frequency response e Speaker frequency response e Reverberation analysis 3 position measurement Normally the recommendation is 3 position measurement The measurement is made in 3 positions in the room producing a more accurate measurement that helps find room modes easier
22. isplayed in the spectrogram window Below you can see two examples where the left room has big problems with room modes and very long decay time while the other room can be considered very well treated with an even frequency response A poor room with long decay times and heavy room A good room with short decay time and even modes frequency response 29 41 Measurement results Found Room Modes Export to XTZ DSP Products Stimulus EQ PRO version only Found room modes that need compensating are shown here Mode A room resonance these are the first priority to deal with EQ A bump peak in a limited frequency area in frequency response where it is recommended that EQ be used Values presented in Found Room Modes can be used directly in a subwoofer with PEQ Parametric Equalizer Values presented in Found Room Modes can be exported to a file for import to the software included with XTZ DSP products XTZ PC remote Click Setup gt Export to export the suggested parameter values You can also export by clicking in the quick button ROOM The Room Analyzer presents values based on the measurements for use in a PEQ These values can be copied to the Stimulus EQ window by clicking on Copy Room Modes The Stimulus EQ simulates a PEQ inserted in the signal chain with the values setup as in the table this is a fast and efficient way of trying out the best PEQ values to optimi
23. it is correct Please remember that good sound is a matter of taste so you have to experiment to obtain your personal goal We wish you best of luck 9 41 Software installation Download the software from our website and install it according to the instructions Room Analyzer II e Connect the USB chord to your computer USB port e Connect the Room Analyzer II microphone to the XLR connector on top of the sound card e Connect the RCA cable to a line input on your receiver subwoover e Start your computer and launch the Room Analyzer software Connection Room Analyzer II Microphone To receiver subwoofer input ROOM ANALYZER II KOPPLINGSDIAGRAM Ansluta Room Analyzer II PRO e Connect the USB chord to your computer USB port e Connect the Room Analyzer II PRO microphone to the XLR connector labeled MIC the sound card e Connect the supplied XLR RCA cable from AUDIO OUTPUT to a line input on your receiver subwoofer e Start your computer and launch the Room Analyzer software MIC AUDIO OUTPUT To receiver subwoofer input To Room Analyzer II PRO Microphone USB port ROOM ANALYZER II PRO KOPPLINGSDIAGRAM 10 41 To computer Download the software from http www xtz se uk support file archive To avoid equipment damage the amplifier subwoofer should be turned off during connection Y splitter to distribute signal to both channels i CD CD RITAPE7MD D
24. itable if the Room Analyzer is to be used with a extremely expensive high performance system in combination with a very good listening room The risk with 1 position measurement is that the sweet spot could be in a dip Sometimes it is impossible to compensate without having other problems One solution is to change sweet spot and or move the speakers subwoofer As a last check a single position measurement can be done Normally the recommendation is 3 position measurement The measurement is made in 3 positions in the room producing a more accurate measure and to find the room modes easier and more accurate countermeasures can be suggested Treatment of the main room modes usually obtains a better listening experience in the entire room This demands equipment with PEQ Parametric Equalizer such as XTZ DSP products Use both measurement methods and compare the results to determine what method you want to use Shows how long time it takes for the sound pressure has decreased to a certain level 38 41 Mode Resonance at a certain frequency Node dip Point where amplitude is close to zero resonance Standing wave A standing wave occurs when a wave is reflected against a wall Two opposite waves are created whose sum does not transfer any energy In the case of a single wall no room mode exist but there could still be standing waves peak anti node dip node Room Analyzer RTA EQ PEQ
25. ker Subwoofer Right Speaker Then press Measure EEERRREEEEE r Measure e Click Measure to start the third measurement The measurements are now finished and the window will be closed when the calculations are done 26 41 Measurement results Frequency response After a short while the the Room Mode Measurement window will be closed and the results from your measurements will be presented In the main window the frequency response is now shown The reverberation time is shown in the smaller window to the right If you double click in the main window the data Double click on the large displayed in each window change window area to swap the main dispay between frequency response and spectrogram There are three different curves Choose by clicking on the right side see picture e Measured Blue curve e Modes EQ Green curve e Result White curve The standard curve the blue is the measured frequency response 80 75 70 3 65 60 55 50 45 40 35 30 dB 8 The green curve shows the frequency response for room modes and EQ adjustments recommended in Found Room Modes The values in Found room modes are those that are shown in the green curve 27 41 The last graph is a calculated curve it displays the expected result from using a PEQ with the suggested parameter values Correction is done according to the values shown in Found Room Modes M
26. odes EO Wo Measured In Advanced Mode you can adjust the graph s Result e e e e We Modes EQ resolution with three different smoothing amounts 2 Measured 3 or 6 ppo points per octave can be selected n Averages 4 0dB 7 i Result smooth 6 ppo Modes smoath 6p x Meas smooth 6 ppo zl t ms 0 0 28 41 In the smaller window to the right a spectrogram is shown a 2D waterfall diagram This picture shows a Measurement result color spectrum with frequency amplitude and time Spectrogram data This is a powerful tool to measure analyze and when necessary treat your room in terms of reverberation time in the bass region This can be done using DSP Parametric Equalizer of other types of acoustic treatments To obtain a better overview you can shift places between the two windows by double clicking on the large window PRO version only Reading the graph Data is put together and displayed in the graph Color scale Amplitude Vertical axis Frequency Horizontal axis Time The idea of the spectogram is to show the decay time as a function of time and frequency An uneven color spectrum suggests an uneven frequency response in the room High amplitudes warm colors reaching far into the right of the chart shows that there are problems with long decay times In the same way that Room Analyzer can show different graphs for Result Modes EQ and Measured can these be d
27. onse measurements with RTA and page 30 for Rull Range 31 41 Manual adjustment of curves Drag amp Drop adjustment PRO version only Adjusting the measurement time axis The following functions are only shown in Advanced mode In Advanced mode there are additional tools available offering further adjustment options for the advanced user By clicking the right mouse button you can grab a peak or a dip then move the marker to correct the curve manually By moving the marker sideways the frequency is altered Release the mouse button and new PEQ values are suggested The new PEQ suggestion can be edited if a more accurate setting is wanted This is done by double clicking the value and editing the Frequency Q and Gain Another method is to right click on the value and select Properties Additional suggestions demand more PEQ channels NOTE Use curve editing with caution Remember that your amplifier might be subject to a harder load if the curve is edited to increase the level at some frequency Begin with small changes and lower parts of the curve rather than elevating them Important The frequency response in Room Analyzer is measured at time zero marked in the spectrogram with a yellow line The yellow time line can be moved sideways by clicking and dragging the line with the left mouse button The frequency response at the time where the line is 0 250 ms is shown in
28. ort email support xtz se website http www xtz se Contact our free of charge support line if you have questions or need advice about installing a subwoofer speaker or software or if you run into any problems during installation Measurement results can be hard to interpret Send us your graphs and we will help you analyze them Contact us using email support xtz se and include your phone number if you wish us to call you 41 41 Always pack the product part very carefully as transportation damages are common If the packaging is insufficient the courier will not pay for the damages Always include a copy of you receipt and a description of the problem
29. own as an F for Fast or and S for Slow on the level indicators LAF or LAS Fast 125m EA A Weighting Dm6 16 41 The second menu allows for switching between the weighted frequency curves A weighting Mimics the ears frequency LAF response at low SPL C weighting Mimics the ears frequency LCF response at high SPL Z weighting A straight frequency response LZF curve between 10Hz 20kHz LAF hold Shows the highest average level measured with the current settings The letter combination LAF will change according to your settings LAF Shows the current average according to the current settings The letter combination LAF will change according to your settings LAeq PRO version only Shows current SPL according to the selected frequency curve The letter combination LAF will change according to your settings Green meter line shows LCpeak level Yellow meter line shows LAF LASpeak according to the settings made above Timer Shows the run time of the meter since start or last Reset Reset Resets all averages PRO version only Pause Freezes all meter values PRO version only 17 41 Menus File New Open Save Save as Import curve Export curve Export Screen Dump Print View Toolbar Statusbar Color Theme Setup Advanced mode Help About XTZ This section contains information regarding the menus and their options Load previously saved measurements Save measurement
30. s Import measurement values from a txt file Export measurement values to a txt file Export measurement in picture format bmp Print Room Analyzer measurement and Time spectrum analysis Shortcuts to Save Print and quick buttons for exporting files to DSP programming Display the pointer position in Frequency and Magnitude level Dark Bright Change the color theme of the program More options settings for some functions e Stimulus EQ e Smoothing possibility e Load Save curves e Change of scale RTA window e Export Room Analyzer amp RTA Software version 18 41 File View Setup Help del EP ih ata cote Black White Choose between a dark or bright theme Before you start Starting Room Analyzer Setting output level Make sure the software is installed and the equipment is See Installation and connected Connection Before the measuring procedure starts make sure the microphone is placed in ear height when adjusting the output level Start Room Analyzer WA Room Analyzer XIZ File View Beads fel g v Advanced Mode For advanced users there is a choice called Advanced Mode which has more settings and features In order to achieve a reliable measuring procedure it is important that the correct output level is set Put the control on the output level in the middle Now there should be a white noise in the speakers The level meter to the right should be up to the green G
31. solution as the Room Analyzer feature but it offers a good indication of how the sound is experienced when listening to music Equalizer a tool that can elevate or suppress the level of certain frequencies A graphical equalizer has predetermined frequency bands A parametrical equalizer can be adjusted to a specific frequency Q factor and amplitude 39 41 Smoothing determines with which resolution and precision a graph should be presented This is a compromise depending on your equipment and personal preference Using the highest resolution it will be impossible to achieve a completely flat frequency response The resolution can then be lowered using smoothing in several steps to give a more relevant result according to how the human ear experiences sound How well minute differencies in sound can be heard depends on each persons ability age and so on Full Range Smoothing Connecting the Room Analyzer to your system The Full Range tab is the most advanced feature in the Room Analyzer Full frequency measurement with higher resolution than the RTA is available as well as tools to how much of the room effects should be shown in the results and finally which of the measurement charts should be displayed RT60 is a decay time measurement done according to the ISO 3382 standard and tells how long time it takes for different frequencies to leave the room This is visually presented as red bars with the decay
32. t When doing a 3 position measurement the box Average 3 positions should be checked In order to achieve an accurate result the measurements should be done in positions that are not too close to each other e Place the microphone as shown To the left in the room some distance from the wall Room Mode Measurement Instructions Place the microphone to the left in the room as shown in the picture Left Speaker Right Speaker Then press Measure Subwoofer V Average 3 positions Cancel gt e Click Measure to start the first measurement A sine sweep is heard from the speakers during each measurement e Move the microphone to your listening position Room Mode Measurement Instructions Move the microphone to the listening position as shown in the picture Right Speaker Then press Measure Left Speaker Subwoofer LULLED r Acton Measure h Read about the differencies between single position measurement and three position measurements in the chapter Technical explanations You can use both methods without problems and compare the results to decide which one you prefer e Click Measure to start the second measurement e Move the microphone to the right in the room this time closer to the speakers Room Mode Measurement Instructions Move the microphone to the right in the room as shown in the picture Left Spea
33. time on top Further there is a waterfall measurement that can be displayed in both 2D and 3D Using this method tons of information can be obtained Smoothing determines with which resolution and precision a graph should be presented This is a compromise depending on your equipment and personal preference Using the highest resolution it will be impossible to achieve a completely flat frequency response The resolution can then be lowered using smoothing in several steps to give a more relevant result according to how the human ear experiences sound If you have a good listening room a good system and some experience from sound you can use the highest resolution If you are less experienced or have not as good equipment we recommend using a lower resolution If the Room Analyzer is to be connected to a complete system front speakers subwoofer you need a Y splitter to feed the signal to both channels This is connected to AUX TV or any other line input free to use 40 41 Microphone Bandwidth Filter type Measurement method Where to send the product for warranty service Support USB microphone software compensated for a flat frequency response between 16Hz 20kHz 20 20 kHz RTA 16 250 Hz Room Analyzer 20 20 kHz Full Range Parametric EQ with variable Q Chirp log sine sweep and FFT For service we refer to our retailers If you have questions about servicing please contact our supp
34. ual Use of the microphone along with third party equipment is not supported and may lead to malfunction or damage of your equipment Be careful with high sound levels Always begin your measurements with your volume settings low and increase them as you proceed with your measurements to protect your equipment and hearing 3 41 Philosophy XTZ Goals Contact Our reference and starting point is to reproduce a natural sound but we still pay attention to the fact that sound is a personal matter of taste With the Room Analyzer we can help you reach this goal To offer the best price performance quality ratio on the market Our concept Produce the perfect compromise Cost effective large scale manufacturing Prioritize product quality before marketing to achieve the best possible performance price ratio Reduce the number of middle men Website www xtz se Email info xtz se 4 41 Why a complete measurement system for the end consumer Why room acoustic analysis software The fact that the room adds coloration to the sound is well known but it is not often brought to the forefront because it is hard to handle with conventional products Every room has unknown and unique acoustic characteristics that affect the sound quality The biggest problems are in the low frequency spectrum A normal not acoustically treated room has several resonances and dips in that spectrum caused by 7 standing wa
35. ves or room modes Depending onthe _ Frequency response of normal listening position these produce incorrectly balanced speakers sound The frequency response of a good loudspeaker should be in the range of 3dB but a normal room can introduce variations of 15dB This leads us to the conclusion that even a very good loudspeaker can sound poor in a bad room Most regular rooms suffer from severe acoustic problems Room Analyzer gives an advanced analysis as the name indicates of the problems that exist in the room system Whatever your system costs you will always have a use for this instrument in optimizing your system gt D i ___ Frequency response of normal If you spend a great deal of money on your system it room is our experience that it is a must to optimize the room or remove the problem with DSP technology Room Analyzer is perfect for this kind of work An analogy with cooking might help here using a timer and thermometer helps you to obtain the same perfect results every time Room Analyzer gives a picture of which frequencies in the bass region cause the problems and provides a way to correct them Room Analyzer can measure the frequency response of any speaker Room Analyzer provides more analysis e Frequency response with RTA Real Time Analyzer e Frequency response with Room Analyzer a Find room modes b Reverberation Time diagram Time Frequency Level c Simulates the use o
36. ze your system To simulate a PEQ in your system e Perform a measurement with Room Analyzer e Save your data with the Overlay function e Click Copy Room Modes to copy the values to Stimulus EQ e Repeat the measurement procedure using the now adjusted signal e Save your new measurement with the Overlay function and compare by clicking the corresponding Show buttons in the Overlay panel Values in the Stimulus EQ table can be deleted by clicking Clear Stimulus EQ 30 41 Found Room Modes Use f Hz G dB Type Mi 53 49 6 24 00 Mode v2 108 36 6 16 75 Mode n VM Test setup XTZ File View Setup Help Final adjustments You can finally tune the frequency response using a graphic EQ Through a frequency response measurement using RTA or Full Range tools you can analyze the entire audio range and determine if any further high precision adjustments are necessary The room compensation is now finished If the measurements were done with only a subwoofer connected the results will differ when the complete system front center surround speakers is connected It is wise to perform an additional frequency response measurement with all speakers in operation If the final result is not adequate it might be because of measurement interference Try re doing the measurements at a slightly higher sound pressure level Please see page 18 for additional information about frequency resp
Download Pdf Manuals
Related Search