Sound Performance Lab 9632 Stereo Equalizer User Manual
Contents
1. Input Format no AES EBU no AES EBU input detected Press APPLY if AES EBU is detected Input Format AES EBU WC AES EBU input with wordclock detected Or Input Format no AES EBU WC AES EBU input without wordclock detected Press APPLY Input Format S P DIF S P DIF input detected Loudness Maximizer Info 13 Info Or Input Format no S P DIF no S P DIF input detected Press APPLY if S P DIF is detected Input Format S PI DIF WC S P DIF input with wordclock detected Or Input Format no S P DIF WC S P DIF input with wordclock detected 3 Displaying the detected sample frequency Sample Frequency 4 4 1 kHiz The Sample Frequency will be detected automatically The display either shows 44 1 kHz 48 kHz or 32 kHz 4 Displaying the audio error flag Audilo Error No No no error detected Yes error detected2. Density encoder Boost Soft Hard switch encoder AUDIO Loudness Maximizer Quick Start Flow Chart The signal analysis computes control data for the Compressor and Limiter and calculates the Possible as well as the Done loudness increase Possible The LED bar shows the possible loudness increase Done The LED bar shows how much of the DESIRED GAIN have been realized The Compressor operates with a static no knee characteristic for most unob strusive compression DESIRED GAIN Adjusts the desired loudness increase Density Controls the amount of compression The Limiter is equipped with SOFT HARD sound control and the BOOST function Control Elements DESIRED GAIN SOFT HARD MORE DENSITY RESETS ACTIVE DESIRED GAIN SOFT HARD MORE DENSITY DOWN uP APPLY STORE Maximizer Leeser L 0000 0 O DIGITAL DYNAMICS PROCESSOR Active Q The ACTIVE function switches the Loudness Maximizer on or off The illuminated LED indicates that the processing has been activated The software bypass also compensates for the 5ms time delay between processed and unprocessed signal The AES EBU input and output are equipped with relay hard bypass In the event of a power failure the Loudness Maximizer is automatically switched to hard bypass power failure safety without interrupting the data flow Relay hard bypass for AES EBU input and output Desired Gain 2 DESIRED GAIN adjusts the desi
3. If you want to apply various presets depress Apply for one second The Apply LED starts to flash indicating that the Apply mode is activated You can step through the preset list with Up and Down Once you have a preset that you want to apply depress Apply again The Apply LED goes out indicating that the preset is applied In case you want to quit the Apply mode without applying the new preset simply press Store To increase operation safety it is impossible to apply presets by simply depressing Up or Down The Up and Down status LEDs will not flash indicating that the input is not accepted You have to depress Store or Apply for one second in order to activate the Up and Down buttons Depressing Store and Apply simultanouesly for about one second gets you into a hardware dialogue called INFO The LC display shows status informations of the digital data stream With Up Down you will jump from one page to the next or previous If a selection is provided use Apply to select Loudness Maximizer 1 Software version and date Software Version 1 0 1 2 1996 2 Selecting inputs The Loudness Maximizer automatically searches for an input signal If both inputs are connected the AES EBU input will be selected first If you want to select the S P DIF input you have to call up the INFO pages Input Format AES EBU AES EBU input detected Or
4. 5 Displaying the CRC Error flag CRC Error No No no error detected Yes error detected 14 L Loudness Maximizer 6 Displaying the Channel Difference Error flag Chan Difference No No no error detected Yes error detected 7 Setting or erasing the Copy Prohibit flag Copy Pirohlibit NO No flag erased or not set Yes flag set Pressing APPLY switches off a set Copy Prohibit flag It is not possible to set a Copy Prohibit flag if there is no Copy Prohibit flag in the processed data 8 Displaying the Original flag Original Yels No no Original flag Yes Original 9 Displaying the Emphasis flag Emphias ijs No No no emphasis Yes with emphasis 10 Selecting a serial port Serial Input RS 232 RS 232 interface for update download from PC Or Press APPLY Serijal Input RS 4 2 2 RS 422 interface for update download from MAC Loudness Maximizer Info 15 Info L 11 Selecting a MIDI channel MIDI Channel o1 Depress APPLY to step from cha
5. Hard Operation The handling of the Loudness Maximizer is very easy Only three control parameters and one switch function are necessary to adjust the loudness maximization process Most of the parameters are set automatically by the programme material itself The algorithms are optimized so that the process is as trans parent as possible DESIRED GAIN sets the maximum level change Adjustable values range from OdB to 15dB The Done LED bar shows how much of the desired gain change was achieved by the Loudness Maximizer The Soft Hard control adjusts the sound character of the Limiter You can gain more loudness by turning the control to the Hard position which increases the risk of audible distortion The MORE DENSITY control allows to sweep from Peak Limiter performance to Compressor performance The higher the value the more compression is applied The BOOST button increases loudness by an additional 2cB Loudness Maximizer Indications and Metering The Loudness Maximizer is equipped with PPM meters for input and output that show the signal level with maximum resolution 0 01dB just before OB The Signal LED is the first LED in each PPM meter that lights up when a digital source is present at the inputs The Possible LED chain represents the first device to show how much subjective loudness can be gained Initial settings for the DESIRED GAIN control are shown here The Done LED chain indicates the percentage of achieved gain ch
6. displayed in the LC display see 6 Adjustment The MORE DENSITY control should be adjusted carefully for mastering tasks Since there is always a need for a compromise between limiting and compression there can be no optimum adjustment 0 to 10 are good starting values When the MORE DENSITY control is set to 24 the Loudness Maximizer tries to gain loudness only by compression In this case the overall level starts to decrease as the compressor pulls high levels down and lifts up low level parts of the signal Advice If you want to compress audio heavily here is a tip on how to maintain maximum output level Example DESIRED GAIN 8 dB More Density12 This MORE DENSITY setting reduces maximum output level by ca 2 3 dB To compensate for the level difference make these adjustments DESIRED GAIN 11 dB MORE DENSITY 8 Result The compression remains the same and the maximum output level is maintained The BOOST button some call it the client button gives the definite kick to the signal It increases the loudness by another 2dB regardless of any other adjustments Using the BOOST button is very much depending on the program material Using it with Trance Techno or jingles etc is uncritical Some Pop Rock productions might benefit as well It is definitely a nice tool to create very impressive samples In the tradition of impressing clients who just want more and more this button does the job well The LC display shows all
7. supply Torroidal transformer 60 VA Fuse 1A slow blow GND Lift switch yes Voltage selector 115 V 230V Dimensions 19 1U 482 x 44 45 x 350mm Weight 4 9 kg 1 AES EBU is defined for levels from 2V to 7 V Measurements AES EBU 4 4 V with load 2 S P DIF is defined for levels from 200 mV to 700 mV Measurements S P DIF 500 mV with load Subject to change without notice 18 L Loudness Maximizer SPL electronics GmbH hereafter called SPL products are warranted only in the country where purchased through the authorized SPL distributor in that country against defects in material or workmanship The specific period of this limited warranty shall be that which is described to the original retail purchaser by the authorized SPL dealer or distributor at the time of purchase SPL does not however warrant its products against any and all defects 1 arising out of materials or workmanship not provided or furnished by SPL or 2 resulting from abnormal use of the product or use in violation of instructions or 3 in products repaired or serviced by other than authorized SPL repair facilities or 4 in products with removed or defaced serial numbers or 5 in components or parts or products expressly warranted by another manufacturer SPL agrees through the applicable authorized distributor to repair or replace defects covered by this limited warranty with parts or products of original or improved design at its option in eac
8. 0 Doing this allows you to create audible compression effects Sometimes this is just what you want and very rarely achieveable with digital compressors Loudness Maximizer Q LED Anzeigen Presets O Storing a preset Depress Store for1 sec LED flashes use Up Down to select preset number depress Store again LED goes out preset is stored Applying a preset Depress Apply for sec LED flashes use Up Down to select preset number depress Apply again LED goes out preset is applied Operation safety Presets can not be changed by accident Info 2 pl The Loudness Maximizer allows you to store up to 99 presets which can be changed by MIDI program change command If you want to store a new adjustment depress Store for one second The LED starts to flash indicating that the Store mode has been activated The LC display now shows the values of the presets including the BOOST function before the Loudness Maximizer was switched off the last time Use Up and Down to select a new preset number The status LED flashes shortly to indi cate that the input depressing Up or Down is accepted Keeping Up or Down depressed will let you jump through the preset list in steps of 5 presets Once a new preset location is found depress Store again The Store LED goes out The preset is stored at the new location In case you want to quit the Store mode without storing the new adjustments simply press Apply
9. D SOUND PERFORMANCE LAB Manual S Loudness 2s Maximizer DIGITAL DYNAMICS PROCESSOR Loudness Maximizer Model 9632 Digital Dynamics Processor Loudness Maximizer Manual Model 9632 by Hermann Gier Version 3 1 9 1999 The information in this document has been carefully verified and is assumed to be correct However Sound Performance Lab SPL reserves the right to modify the product described in this manual at any time Changes without notice This document is the property of SPL and may not be copied or reproduced in any manner in part or full without the authoriza tion of SPL Limitations of Liability In no event will SPL be liable for any damages including loss of data lost profits cost of cover or other special incidental consequential or indirect damages arising from the use of the unit however caused and on any theory of liability This limitation will apply even if SPL or an authorized dealer has been advised of the possibility of such damage SPL electronics GmbH P O Box 12 27 D 41368 Niederkruechten Germany Tel 49 0 21 63 98 34 0 Fax 49 0 21 63 98 34 20 E Mail info spl electronics com www spl electronics com SOUND PERFORMANCE LAB 1999 SPL electronics GmbH All Rights Reserved C 4 FORE W Oli sscscacarsvsedviolets scasatedeccpetversaesvectvealsavdesestansabedetastvsnlein vhdatioseicietes 3 Tha kSnnen ninna a anna
10. K OF ELECTRIC SHOCK DO NOT OPEN 5 After successfully installing the new software version the LC display says download valid DB 100 120V 60Hz Bll Ss qa a BAD 220 240V 50 H VOLTAGE SELECTOR 6 Switch the Loudness Maximizer off and on The new software version number is displayed in the first INFO page simulta neously depress Store and Apply also refer to Control Elements No 9 INFO FUSE 1A 35 WATTS CE 7 lf an error occurred during download the LC display says download failed The Loudness Maximizer now waits for a new download Please check all adjustments on your terminal program and try again If you are still unsuccessful contact your local dealer Rear view Loudness Maximizer Model 9632 Loudness Maximizer All controls are in the start off positions DESIRED GAIN 0 SOFT HARD 9 MORE DENSITY 0 1 Press ACTIVE LED illuminates 2 Watch the Possible LED chain and adjust the shown value with the DESIRED GAIN for most unobstrusive operation the Possible LED chain should not show negative values 3 If more loudness is wanted turn the SOFT HARD to higher values i e 3 The Possible LED chain shows you the new free loudness headroom that you ad to the previously adjusted DESIRED GAIN value 4 To increase the density of your source material turn up the MORE DENSITY control AUDIO signal analysis Possible display Done display compressor Desired encoder
11. Loudness Maximizer Adjusted output levels will be stored and will be active the next time you boot the Loudness Maximizer If you recognize that your unit does not maximize to full scale please check the Output Level parameter first The Output Level attenuation is not shown in the Output PPM meters Tip The Output Level should only be used where the output signal should permanently be lower than OdB The Output Level setting will be ignored when a MIDI volume change command is present MIDI has first priority Note that the setting in the Output Level page will still show the reduced output level nevertheless a MIDI volume change command may already have reset the output level to a different value Therefore if you use MIDI set Output Level to OdB You leave the INFO pages by depressing STORE Loudness Maximizer Info Specifications Input Output Sample rate frequency 32 48 kHz automatic detection AES EBU twisted pair 1 AES 3 AES EBU in amp output impedance 110 Ohms S P DIF co axial 2 SPDIF 2 S P DIF input impedance 75 Ohms Wordclock In Through co axial BNC Wordclock in output impedance 75 Ohms MIDI In Through yes RS 232 PC yes RS 422 MAC max 14 V yes Free download at www spl electronics com Clip display Input transformer AES EBU Output transformer AES EBU Relay Hard Bypass AES EBU Measurements AES EBU Jitter 1ns S P DIF Jitter 3 ns Wordclock In Jitter 1 5 ns Power
12. ange It shows how much of the Desired gain setting was actually realized The philosophy behind the digital audio processors is that they are designed to be operated like analogue units there is only one INFO menu but no multi function controls The LCD readout simply shows the current encoder positions and the preset number The encoders are built without clicks or detents so they feel like analogue pots Our DSP platform uses two Motorola 56002 DSPs running at 66 MHz This enormous computational power guarantees real time operation where sophisticated DSP algorithms will not be restricted by resource limitations The general concept is that each digital processor should fulfill only one task in the most effective way possible and with a minimum of controls and switches As much as possible should be auto mated to promote user friendly operation the external controls access only the sonically relevant parameters Additionally all controls with a wide value range e g 0 to 100 are programmed with an alpha dial logic Turning the encoder rapidly causes the values to jump in steps of 10 whereas turning the encoder slowly causes the values to proceed in single increment steps The housing of the Loudness Maximizer has the standard 19 EIA format and occupies 1U 44 mm in your rack When installing the unit in a 19 rack the rear side of the unit needs some support especially in a touring case The Loudness Maximizer should not be
13. ems with soft and hard limiting the Loudness Maximizer does not produce additional harmonics This phenomenon is a standard problem with other systems leading to increased sharpness and sound manipulation a gf naloge Origi alkurve Typische Digital Limiting Kurve Die scharfen Ecken verursachen O dBfs harmonische Verzerrungen ca 4 7 kHz Der Loudness Maximizer vermeidet die Ecken und berechnet einen weichen Kurvenverlauf der keine harmonischen Artefakte produziert Der SOFT HARD Regler bietet 18 Kurvenverlaufe an Loudness Maximizer 2 Desired Gain Soft Hard Defining the way the Limiter sounds and defining if invalid samples are allowed or not Diagram The Loudness Maximizers Limiter does not produce harmonical distortion More Density How do restore output gain when heavy compression MORE DENSITY is applied Boost LC Display 10 L OQ O With the MORE DENSITY control you can change the principle behaviour of the control loop of the Loudness Maximizer This parameter describes the Compressor to Limiter proportion In addition internal rules and algorithms will be changed too The higher the MORE DENSITY setting is the more work will be done by the Compressor If MORE DENSITY is set to 0 only the Limiter is operating If MORE DENSITY is set to 24 only the Compressor will be working leaving the Limiter active as peak protection The adjusted value is
14. encoder settings and the number of the preset being used in the last session with the Loudness Maximizer for details on Presets refer to 8 More information is displayed when activating the INFO pages see 9 Press Store and Apply for 1 sec to enter the INFO pages Loudness Maximizer The Input and Output LED chains are PPM peak level meters By evaluating both LED chains an approximated effective loudness increase can be estimated The LED chains have a very fine resolution before OdB The OdB position is actually showing 0 01dB which represents the last possible output value of the Loudness Maximizer No clipping is possible within the algorithm of the Loudness Maximizer The first LED in each Input and Output PPM meter is a signal Sig LED to indicate that a valid digital source is connected and detected This LED helps you to verify the signal flow within a digital processing chain If one Sig LED is not illuminating you have a first indication of a faulty digital signal flow The last LED of each Input and Output PPM meter is a Clip LED The LED illuminates if the digital signal is too hot causing digital distortion Warning Some level meters even in digital products show clipping striking below OdB full scale You can trust the Loudness Maximizer The PPM meters show peak levels with a precision of up to 0 01dB 0dB on scale The internal precision is even higher We consider the Possible LED chain the first measuring i
15. h respect if the defective product is shipped prior to the end of the warranty period to the designated authorized SPL warranty repair facility in the country where purchased or to the SPL factory in Germany in the original packaging or a replacement supplied by SPL with all transportation costs and full insurance paid each way by the purchaser or owner All remedies and the measure of damages are limited to the above services It is possible that economic loss or injury to person or property may result from the failure of the product however even if SPL has been advised of this possibility this limited warranty does not cover any such consequential or inci dental damages Some states or countries do not allow the limita tions or exclusion of incidental or consequential damages so the above limitation may not apply to you Any and all warranties express or implied arising by law course of dealing course of performance usage of trade or otherwise including but not limited to implied warranties of merchantabi lity and fitness for particular are limited to a period of 1 one year from either the date of manufacture Some states or countries do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to you This limited warranty gives you specific legal rights and you may also have other rights which vary from state to state country to country SPL electronics GmbH 41372 Niederkruec
16. hten Germany Loudness Maximizer Warranty
17. installed near units which produce strong magnetic fields or extreme heat Do not install the Loudness Maximizer directly above or below power amplifiers Check that the voltage details quoted on the back panel are the same as your local mains electricity supply Use a minus screwdriver to set the voltage selector to the voltage for the area in which the unit will be used Never cover up the ventilation slots on the top of the unit If during operation the sound is interrupted or indicators no longer illuminate or if abnormal odor or smoke is detected or if liquids are spilled on the unit immediately disconnect the power cord plug and contact your dealer Only clean your Loudness Maximizer with a soft lint free cloth Loudness Maximizer Input and Output PPM metering POSSIBLE LED bar shows how much subjective loudness can be gained Analogue control feeling The DSP Platform Enormous computational power guaranteeing real time operation User friendly programmed software Operation Safety CAUTION RISK OF ELECTRIC SHOCK NOT O DO PEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR Connections Before connecting the Loudness Maximizer switch the power off at all connected units The rear panel provides AES EBU and S P DIF inputs and outputs Any additional channel status and user bits are passed through unaltered and the outputs can be used at the same time if required The Loudness Maximize
18. n 3 MtrodUCti O scsisisesnniiriiiinienenininiiiiiiniiiiaiinani iiaii 4 Operation Safety sisisi 5 CONNECTIONS sei ssssescssicisceisiansishvidsesaassdbassenessisesisiventnsiennsieaeadonsiventnns 6 Flow halaa EE EEG 7 Control Ele ements iss sinioreso enia 8 PA GTIN EvesscseveseseaccesitesdetsevdeansedsvstuuscavedoccudvasbededeshosnoscSescusSabadshind taleasaedaseiSosbes 8 DESIRED GAIN diiine A 8 SOFTFHAR Dzene EEREN 9 MORE DENSITY ecien nii 9 BOOST meisroiareinioriri a Tiii REEE AORO ERE 10 LCD DISPLAY sonsiiscnsncusiinicieiienianininnn iii 10 PE DS CHIAIINS i sseocsce sietuic taasetocccchotedashesvicustatsacivstssacvatedsecscsacleadtvsclaaeeicisiaces 10 PRESETS EaI E RA OEA E 11 MINE a 12 SPECIFICATIONS siisii 17 Warranty esescidexivsusvesavnsescndscvedsauvusvavevevevavenesdiasuecsvsdesudsnensverivavevsvendnisssdsunass 18 Dear customer Thank you for the confidence you have shown towards Sound Performance Lab by purchasing the SPL Loudness Maximizer You have decided to use a tool of high performance which sets you in the position to have faster success and a better sound quality in your music productions and pre masterings As a typical SPL unit the Loudness Maximizer combines exem plary specifications and high manufacturing standard with excel lent sound quality to provide you a precious component for studio and mastering purposes Please read this manual carefully to ensure you have all the information you need to use the Loudne
19. nnel 01 up to channel 16 In order to increase operation safety only send the necessary MIDI data to the Loudness Maximizer Unnecessary information might lead to system failure You can use MIDI to create a MIDI fade out if you are working with a digital console that does not provide master inserts The Up and Down LEDs illuminate indicating that a volume change command is received You can also switch between presets with the MIDI program change command This can especially be useful when you are mastering a song for example that requires different settings for chorus refrain or bridge The Apply LED illuminates indicating that a program change command is received MIDI IMPLEMENTATIONS Basic Channel Change 1 16 stored Control Change 7 1 127 Volume Program Change 0 99 real value 12 Adjusting the maximum output level In certain applications i e recording to Sony Digital Beta E 2dBfs it may be important to maximize loudness to a specific output level that is below the full scale level The Output Level can be set to a lower level than OdB The default position is OdBfs which can be attenuated to 12dB in steps of 0 5dB You can change the Output Level in the INFO pages Adjust the Output Level with the DESIRED GAIN encoder which has to activated by depressing the Apply button first Output Level
20. nstru ment for analysing a possible loudness improvement at all For measuring this parameter the input material has to be analyzed precisely By combining this analysis with the parameters DESIRED GAIN and SOFT HARD it is possible to compute the loudness yet available in real time The Done LED chain shows how many per cents of the DESIRED GAIN have been gained currently When adjusting the Loudness Maximizer this value should not be under 50 permanently The display especially reacts on the MORE DENSITY control as well as on the stucture of the source material When the MORE DENSITY value is greater than 10 The Done LED chain may possibly show values between 60 to 90 permanently This will only indicate that the compressor is working within its static curve Using the metering If your general attitude towards loudness maximization is to do this job with no audible side effects the Possible LED chain should not show negative values and the Done LED chain should shows values between 90 and 100 indicating that the processors can realize what you desired The harder you set the Limiter s operation the more loudness can be gained Once you leave the 9 to 5 positions of the SOFT HARD control moving up to 0 or above you will have effects on the overall sound If you want to compress your audio heavily you should drive the DESIRED GAIN up even if the Possible LED chain shows negative values or the Done LED chains drops down to i e 5
21. r operates with 24 bit word width It accepts 16 bit and 20 bit inputs and will create output signals according to the input resolution 75 Ohm through n worpcLock in For synchronisation purposes Wordclock In and Wordclock Through BNC connectors are fitted with a switchable 75 Ohm termination S PDIF output MIDI In and MIDI Through connectors allow presets to be selected via MIDI program change commands AES EBU input For easy upgrade of future software releases the rear panel offers RS 232 interface for PC and RS 422 interface for MAC Q e O oO AES EBU output 3 a Installing Updates Note All presets will be lost after installing a new software version 1 Connect your computer with the Loudness Maximizer via a serial port with a standard Z modem cable RS 232 for PC and RS 422 for MAC DSP programming by Spectral Design 2 Open a terminal program like Hyperterminal on PC and make the following adjustments Baud rate 9600 Stop bit 1 Parity none Data bit 8 Handshake no Transfer mode ZMODEM 3 Switch on the Loudness Maximizer and depress both Preset Up and Preset Down until the LC display says wait for Zmodem download SPL electronics D 41372 Niederkr chten GND LIFT EE Serial On 4 Load the update file into your terminal program and send it to the Loudness Maximizer The LC display shows the progress of the download in kB RIS
22. red loudness increase in dB Adjustable values range from OdB to 15dB The value is shown in the LC display see 6 The Loudness Maximizer tries to increase the energy of the signal or the effective loudness respectively by the value entered The DESIRED GAIN encoder is directly coupled with the Possible LED bar see 7 which gives you an initial indication on the setting of the DESIRED GAIN encoder The loudness increase cannot be displayed in standard level or peak meters The Possible LED bar is Adjusting the desired increase especially designed to show the possible increase in subjective in loudness loudness Even normalized audio files can effectively be increased in loudness without sound manipulation Additionally the Done LED bar shows how much of the adjusted DESIRED GAIN have actually been achieved Setting To get a good starting position for the signal analysis a loud part of the signal should be played Watch the Possible LED bar For example If it shows 3dB adjust 3dB with the DESIRED GAIN encoder The Possible LED bar now shows OdB An initial loudness optimization without any sound manipulation is now already complete 8 L Loudness Maximizer You can gain more loudness and also start to manipulate sound when you choose other than the initial settings for SOFT HARD see 3 or MORE DENSITY see 4 After having changed these parameters a readjustment of the DESIRED GAIN is mostly advis able The SOFT HARD encoder control
23. s even more loudness the Loudness Maximizer can be coaxed into producing audible changes in the sound which are optimized to be useful in a crea tive sound design context The DSP algorithm constantly analyzes the input signal and com putes the data for the most unobtrusive dynamics processing using an algorithm developed from extensive psycho acoustic and audiometric research The dynamics processing is not simply limited to Peak Limiting nor Compression but is an intelligent combination of both where the characteristics of the input signal determine the processing interactively and automatically The Compressor used within the Loudness Maximizer treats the audio as an entity and utilizes a static no knee compression characte ristic that operates without steps The use of a multi band design was specifically avoided because splitting up audio into several bands then remixing them after processing usually affects the coherence of the signal and causes intermodulation resulting in sound coloration The Limiter works after the Compressor and is designed to cut peak levels effectively by creating a minimum number of invalid samples This is achieved by re calculating the original peak curve on a lower level but maintaining its shape where the Soft Hard control provides access to the sound of the Limiter Using the Soft position creates a rounded bell with virtually no invalid samples You can gain more loudness by turning the control to
24. s the operation of the Limiter and influences the sound of the Loudness Maximizer The control range is 9 very soft to 9 very hard The adjusted value is shown in the LC display details see 6 The higher the adjusted value the harder the sound becomes The Loudness Maximizer will allow invalid samples possibly resul ting in audible distortion The Possible LED bar will show you increasing values more subjective loudness to gain the more the SOFT HARD control is turned to hard Use the DESIRED GAIN control to exploit the additional loudness Low SOFT HARD values i e 9 up to 5 let the Limiter recalcu late the original curve on a lower level allowing no invalid samples at all This way of operation is very unobstrusive but will not allow very high loudness maximizations The setting of the SOFT HARD control is an aesthetical question and extremely dependent on taste and the source material Roughness sharpness and distortion become audible when critical program material like classical music or single instruments that show almost sine wave like waveforms are treated with Hard settings In these cases set the SOFT HARD control between 9 and 3 Music with a high density in high frequencies or complex signals can be treated with values between 6 and 3 without creating audible distortion Uncritical material like dance floor productions jingles or promos may be treated with values between 0 and 9 In comparison to other syst
25. ss Maximizer We wish you every success with your new Loudness Maximizer Your Sound Performance Lab Team would like to start with my thanks to all our staff who created what is to be described here Special thanks go to J rg Houpert J rg Mayer Andreas Skabe and Klaus Peter Webersinke from Spectral Design as well as Harald Obenland from Octum electro nics Our products are often tested and compared in many publica tions and by our customers themselfs and constantly valued with best results would like to pass on this broad appreciation to those who deserve it my excellent colleagues Hermann Gier Loudness Maximizer Contents Foreword Thanks L 3 Introduction Maximizing the subjective loudness without sound colo ration A look ahead signal analysis computes data for most unobstrusive limiting and compressing Easy and intuitive operation L SPL s digital audio processors are designed in cooperation with Spectral Design of Bremen Germany who are responsible for the DSP programming Concept The Loudness Maximizer is the first digital 19 inch dynamics processor to utilize new psycho acoustic algorithms which are designed to maximize subjective loudness and to exploit effectively up to 99 9 of the available headroom with guaranteed clip free performance Even a normalized sound file can be made subjectively louder without changing the essential character of the sound yet if the user want
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