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Listening Lab - User Manual - Listening Lab

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1. You have now written session number into the program Change your settings as necessary for session number 2 and then SHIFT CLICK on dot number 2 You will see the dots light up as they are saved one by one After saving as many sessions into your program as you need to click SAVE to save the program file to disk MAKE SURE TO SELECT JSON as your file extension Now select a folder to save to To load a session after starting up Precision Ear Click LOAD Select the preset file in the location it was saved and double click to load it up Now click on session number 1 in the SESSION CHART Use the playback section to load up the music or audio specified in the session label or connect a microphone as required Once the mic is connected or the music is playing check the balance on the headphones click the BALANCE button and click START on the PROGRAM INPUT The program will now run to completion and when it is finished the little green dot will disappear Move on to the next listening session Recording a program to CD WAV This is the most common way to use Listening Lab It is most convenient since you can build a library of programme sessions recorded to WAV These WAV sessions can be played on any normal playback device as long as the correct headphones are used There is thus no need to use the Listening Lab software unless you are either recording a new session or using the software for an active session 1 Click
2. 10 0834 3 LTX eg2 Gregorian 20dB 4 5 5 4 0 0 7776 6 LTX eg3 Mozart 25dB 5 5 5 5 50 50 3376 1 All the settings used in Listening Lab are specified in this program format Note that the Balance setting is adjusted directly on your headphones In addition you may wish to specify the output levels for air and bone conduction If you have recorded your program to CD then all that the patient would require would be to know the name of each program Saving and Loading using the PRESET function Now that we ve explained how to create a program session in Precision Ear it is time to discuss how to combine these sessions into a full PROGRAM that you can save to and load from the hard disk SESSION CHART PROGRAM DETAILS SESSION DURATION To delete the current program and create a new one click NEW Now set up your first listening session exactly as already described in this chapter Click on Patient Name and Date and type in your Patient s details Click Session Name and type in the type of session this will be Click Type of Music or Speech to specify what kind of AUDIO INPUT is required for this session Click on 30MIN to change between 30 minutes and 1 hour for session duration When your session is ready move your mouse over the SESSION CHART You will see that each little dot becomes highlighted when you move over it 15 SHIFT CLICK on dot number 1
3. of specified music such as Mozart or Gregorian chant on CD and then convert those recordings to WAV or AIFF files on your hard disk Do not use MP3 s for listening therapy Music used for listening therapy should be stored and numbered in separate playlist folders Put enough music for one session in each folder and then switch between folders using the SELECT button next to MUSIC FOLDER A dialog will appear asking you to specify a folder BBN Desktop Ciu Network Ubraries B Shaun Karssen a ME Computer amp Shaun C EA DVD RW Drive D My Movie 6 e BD ROM Drive E ey KINGSTON F Select the folder where your WAV or AIFF program music is stored and click OR MAKE SURE YOUR AUDIO OUT SWITCH IS SET TO ON Press PREV or NEXT to select your starting track and then press PLAY to start playback You should hear music in the headphones on both air and bone conduction Press STOP to halt playback If you wish to see only a particular file format within a directory change the FILE FORMAT dialog to the file type of your preference Output Setup Adjust the OUTPUT faders These control the level of the signal to the headphones after processing The output faders also control the level which is sent to the RECORD function Both output VU meters will warn you if there is any clipping of the signal The small box on the right of the OU
4. the FILE button on the playback bar 2 Select a filename and location as well as a file format for your program recording 3 Click OK 4 Get your session set up in Perfect Ear 5 Click REC to begin recording 6 Click START to start program T Click PLAY to start music playing 8 When the session is finished or you click stop the recording will also stop Your WAV file can now be saved to a Device or DVD for portability 16 SUPPORT and troubleshooting If you require assistance using Listening Lab please contact us at precision ear gmail com If you have trouble and cannot hear audio output from the software the following check will eliminate all possible Listening Lab setup faults l Restart the software a Perform the Audio Setup as per the User Manual 3 Click the AUDIO OUT button to the ON position 4 Load a WAV file using the playback section and press PLAY If you still do not hear sound the fault is with your operating system or your sound card Please consult the relevant manuals to identify the fault This software is constantly in development and will be improved time after time If you have any comments or suggestions please feel free to email the author
5. which is often used 5 5 5 5 however a more moderate setting can be easily devised with experience Press RESET to return the FILTER to its zero position Precession and Retard Each of the FILTERS actually provides two identical filters one for air and one for bone conduction Air and bone channels are gated independently AUDIO OUT on DEL The two indicators next to the GATE fader show gating in the Bone conduction CO and air conduction CA channels respectively The CONFIG Coren Precession control function delays the gating of the air conduction channel by a certain number of milliseconds When the signal level fo ms z exceeds the gate threshold the CO channel is gated immediately The CA channel is gated after the length of time specified in the Precession ETAR me control When the signal level drops below the threshold the gate 0 po ms fo closes on both channels simultaneously The Retard function is similar to Precession however both the gating on the air conduction and that on the bone conduction are delayed The two functions can be used in combination To change the Precession or Retard setting simply drag the number box up or down to change the value in milliseconds or click the box and type in the value Lateralization The Headphones provided with Precision Ear are fitted with a Balance Control This control in reality is simply an attenuator for the LEFT ear When the balance
6. ISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES OR OTHERWISE UNDER OR IN CONNECTION WITH ANY PROVISION OF THIS LICENSE EVEN IN THE EVENT OF THE FAULT TORT INCLUDING NEGLIGENCE STRICT LIABILITY BREACH OF CONTRACT OR BREACH OF WARRANTY OF THE AUTHOR EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Program Features CD Quality Audio The software uses three possible audio sources WAV or AIFF audio files on the hard drive CD input via sound card or MIC input via sound card Air and Bone Conduction and Lateralization Output of program has bone conduction mono routed to LEFT channel and air conduction mono routed to RIGHT channel These channels can be reversed Proprietary headphones are included to route this output signal to the ears The headphones are fitted with a balance control to facilitate lateralization The filtering on these channels has been carefully optimized according to convention Record function Output can be recorded to hard disk to be copied onto a CD for portability and convenience The abovementioned headphones will be required to listen to these CD s Gating Function Gating mechanism switches between two different EQ stages for LF to HF transition Gate threshold is adjustable and gating occurs as soon as the level of high frequency material crosses above the threshold Precession and Retard Air conduction signal is gated independently from bone conduction signal Precession
7. Listening Lab nstruction Manual Precision Ear a music FOLDER SELECT FILEFWLTER AIFF PROGRAM cope Mozart Adagio in E K261 wav ro ro ro ro Lo ap ma lt 1 MIC LINE 2 MUSIC 3 GATE FILTER 1 FILTER 2 AUDIO OUT ON DELAYS OUTPUT 1 OUTPUT 2 i LO HI LO HI CONFIG OPEN Latency Air p Bone a an r lt lt z l PRECESSION 5 s Fa ala ala Output 1 BONE y nx 0 AIR RETARD Output 2 27dB RESET RESET ms 0 0 0 dB 0 0 dB ON ON SESSION CHART PROGRAM DETAILS SESSION DURATION ELAPSED TIME NEW m Patient Name and Date 0 00 00 Session Name Type of Music or Speech bpo CLEAR ALL FREQUENCY Hz 125 250 1k 1 5k 2k 3k 4k 6k 8k 12k PRECISION EAR v1 0 by Shaun Karssen sdkarssen gmail com Copyright c 2012 Listening Lab Listening Therapy Software copyright S D Karssen 2012 Listening Lab Listening Therapy Software User Manual copyright S D Karssen 2012 Published by S D Karssen 14 Riverton Road Rondebosch Cape Town 7700 South Africa All rights reserved This User manual may not be reproduced stored in a retrieval system or transmitted in any form or by any means electronic recording mechanical photocopying or otherwise in whole or in part without the prior written consent of the publisher Although every care has been taken in the preparation of this Reference the authors can not take responsibility for any loss or d
8. TPUT faders can be used to swap the outputs This is not recommended unless your headphones were obtained from a third party and are wired in reverse with the L signal going to air instead of bone conduction AUDIO OUT p DELAYS OUTPUT1 OUTPUT 2 B i i i 0 Latency CA CO la lt q Output 1 i fo J opaa fo 0 0d8 0 008 ili 10 Gating Setup Adjust the two filters to the position shown below This is the position used in most Listening Therapy Sessions The fader labeled GATE shows a high frequency split of the INPUT used to control the GATE To adjust the gating between these filters raise and lower the GATE fader until there is a fair amount of gating occurring i e the signal spends roughly equal time above and below the threshold on average When the signal is below the threshold Filter 1 is in effect When the signal level exceeds the threshold Filter 2 comes into effect The gate effectively switches between these two filters You can see the indicators turn green when the HF signal is above the threshold When the gate threshold is set adjust the filters to your specification FILTER 1 represents the frequency response LF predominates when the level is below the threshold and FILTER 2 is the setting for when the level of the HF exceeds the threshold HF will predominate 3 GATE FILTER1 FILTER 2 LO HI LO HI The above setting is the maximum filtration possible
9. amage arising from any errors or omissions it may contain Listening Lab is a trademark owned by Shaun Karssen All other trademarks are acknowledged as the property of their respective owners Forward Welcome to the Listening Lab Listening Therapy software platform Listening Lab is a unique application which is facilitating the crossover from hardware to software processing for listening therapy professionals In the 1970 s when Dr Alfred Tomatis s audio psycho phonology first began to proliferate audio technology was bulky and costly Making music in recording studios for example required large investments from record labels due to the overwhelming expense of recording equipment Today recording studios are nearly obsolete because of the low cost of digital software recording tools What once was an impossible dream for the would be recording musician is now commonplace in bedrooms around the world the software based recording studio The field of listening therapy on the other hand has been relatively slow to implement the recent advances in technology Listening Lab is making this transition for the future of listening therapy worldwide The software costs approximately a tenth of the price of comparable hardware which means that the therapist looking to expand their listening therapy practice may now have as many facilities as they require Portability is maximized with no more than a laptop computer and a set of our included propri
10. control on the 11 headphones is set to 10 The signal is equal in both ears When the control is set to 0 then air conduction comes only from the RIGHT ear Always specify the Balance Control in your program under Balance When this number changes either from the user clicking on it or by loading up a program The Button next to it will flash red and read CHECK This is an indication to check that the balance control on the headphones corresponds to the number in the Balance window When this has been checked click the CHECK button It will turn green and read OK The program can now be started The program will not run until the button has been checked Programming Precision Ear The core feature of Precision Ear is the program input in the top right hand corner of the main window This little console is where you will input a four digit program which will filter the audio sequentially The four digit system is used for simplicity of program description You will see four number boxes Input one digit from your program code into each box either by clicking and dragging up or down or by clicking on the box and typing the number of your choice Practitioners of the Tomatis Method will be familiar with these program codes however here is a guide to their meaning A program for listening therapy consists of 15 60 listening sessions of 30 mins or hour each Each session will have a program input code and will al
11. delays the opening of the air conduction gate by a specified number of milliseconds The gates will always close together and the closing of the gates is never delayed Retard delays the opening of both gates air and bone by a specified number of milliseconds Digital delays Each output has a delay function and the latency of the sound card can be subtracted from this delay function Programs and Sessions Create up to 60 listening sessions in each program Program includes client data and other details When a session is finished it disappears from the program Spectrum Analyser High visibility spectrum analyser shows critical frequencies and frequency response in real time Familiar Numbering System for Program Input Program Input allows conventional Tomatis listening programs to be entered into the software in the same format as with proprietary hardware Compatibility Audio configuration option allows complete control over audio drivers and sound card inputs and outputs Simple User Interface Minimalist interface allows maximum simplicity of use Installation Listening Lab Recommended System Requirements Microsoft Windows XP SP3 or later Windows Vista or Windows 7 Intel Pentium 4 2 0 GHz AMD XP 2000 or better 512 Mb RAM 10Gb free hard disk space DirectX 9 0 Compatible Graphics card Keyboard and Mouse CD ROM or DVD ROM Drive Listening Lab Headphones Low Latency External USB Sound Card such as Focu
12. dow This window contains all the functionality of the software in one view At first it may look a little complex but after using it once or twice you will see how natural simple and intuitive it really is PLUG YOUR CUSTOM LISTENING THERAPY HEADPHONES INTO THE OUTPUT OF YOUR SOUND CARD AND PUT THEM ON INITIALLY EXTEND THE EAR CUPS SO THAT THE HEADPHONES SIT LOOSELY AND THEN GRADUALLY ADJUST UNTIL THE FIT IS COMFORTABLE MAKE SURE THE BONE CONDUCTION TRANSDUCER IS IN GENTLE CONTACT WITH THE TOP OF YOUR HEAD Audio Setup If you are using an external USB sound card as specified in the system requirements you will need to set up your hardware Please do this whenever you have unplugged or switched off your USB sound card and then wish to use it again otherwise your computer may fail to initialize the drivers and audio distortion will result To set up hardware in Listening Lab click the CONFIG button in the AUDIO Section in the main window The following dialog box will appear Select the Driver menu and click on the desired driver With an external USB sound card this may be an ASIO driver File Edit Window Help Off ad_mme Audio Driver Input Device Microphone Realtek High Once you have selected the driver you should Output Device Thread Priority Speakers Realtek High De click Audio Driver Setup at the bottom of Highest 80 the box This
13. ear each frequency as a distinct change in the sound as the low frequencies are subtracted from the audio Press PAUSE to halt the session This halts only the filtration sequence and not the AUDIO INPUT so you will still hear sound Pressing PAUSE again will continue the program skipping ahead to the next frequency band The little green light will always flash if a program is in effect and will continue to flash if the program is paused Pressing stop ends the program and resets the counters Pass Band Sessions Listening Lab is fully capable of processing Pass Band sessions which are often used in listening therapy In these sessions all of the frequencies outside of a specified range are attenuated To programme a pass band session simply change the last digit of the programme code to 8 For example a programme code of 4608 would create a Pass Band session where the lower center frequency is 1500Hz and the upper center frequency is 3000Hz Thus only frequencies between those two extremes would be passed You may easily fine tune the frequencies of the Pass Band session by manipulating the sliders just above the spectrum analyser since it may need to be adjusted slightly for various recordings 14 Labelling a Program You may wish to write down details of your programs Use a similar chart to that seen below Name Music Gate Filter Filter Precess Retard Number Balance LTX egl Mozart 25dB 5 z 5 100
14. els and distortion can damage hearing and disrupt the listening curve In addition to the recommended requirements users of Listening Lab will need a special set of headphones These customized headphones provide air and bone conduction through proprietary transducers The software cannot be used with normal headphones as the listening methods in question rely on specific delays between air and bone conduction Please contact the us for more information regarding these headphones MP3 s SHOULD NEVER BE USED FOR LISTENING THERAPY The algorithm used in MP3 encoding takes advantage of the psychoacoustic phenomenon known as masking The resultant loss of audio data is immediately apparent when a filter is applied to an MP3 file Only use CD Audio WAV AIFF or similar lossless format converted to WAV or AIFF DISCLAIMER TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW IN NO EVENT SHALL THE AUTHOR HIS AUTHORIZED RESELLERS OR THEIR SUBSIDIARIES BE LIABLE FOR ANY SPECIAL INCIDENTAL INDIRECT PUNITIVE OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO DAMAGES FOR LOSS OF PROFITS OR CONFIDENTIAL OR OTHER INFORMATION FOR BUSINESS INTERRUPTION FOR PERSONAL INJURY FOR LOSS OF PRIVACY FOR FAILURE TO MEET ANY DUTY INCLUDING OF GOOD FAITH OR OF REASONABLE CARE FOR NEGLIGENCE AND FOR ANY OTHER PECUNIARY OR OTHER LOSS WHATSOEVER ARISING OUT OF OR IN ANY WAY RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT THE PROV
15. etary headphones required for a fully functional listening therapy station and with the ability to record to audio formats even the laptop can be replaced by a simple CD player or iPod for the client to listen to at home Air and bone conduction and lateralization is all taken care of by the headphones Listening Lab allows the programmer a great deal of control over its parameters however it can be as simple or as complex as you are comfortable with based on your level of understanding of audio design and of listening therapy Most Tomatis practitioners who are familiar with the Electronic Ear will find it relatively straightforward Listening Lab can be used simply as a vehicle for a variety of successful generic preset programs or you may design and edit your own custom programs to suit your clients individual needs Whatever the case may be we thank you for your support and we wish you all the best with the new resources at your command Kind Regards The Listening Lab Team Important Notices PLEASE READ THIS ENTIRE MANUAL BEFORE USING THE PRECISION EAR SOFTWARE Listening Lab should only be used under the supervision and guidance of qualified persons familiar with listening therapy Listening to an incorrect program for extended periods may cause ear fatigue and other adverse effects Safety first Always listen to the signal coming from your Listening Lab program before administering it to another person High sound pressure lev
16. he processors of your computer using software routines What this means is that Listening Lab is a Virtual Audio Device For the purposes of this manual we will talk about Listening Lab s signal path as though it were a real analogue audio device The Listening Lab Process is simplified as follows 1 You feed a signal into Listening Lab This can be music or voice We will call this signal the AUDIO INPUT The AUDIO INPUT is split into two channels Each channel is filtered and then a gate switches between them to stimulate the muscles of the middle ear There is a separate gate for air and for bone conduction This gating mechanism is subject to time delays called precession and retard The Signal is further filtered This means that the frequency response of the signal is manipulated and these manipulations are programmed into a sequence via the PROGRAM INPUT The signal finally emerges at the AUDIO OUTPUT The patient s air bone conduction headphones are connected at this AUDIO OUTPUT All this happens instantaneously however it is important to remember this as a sequence Every feature of Listening Lab relates to some aspect of this process Using Listening Lab This chapter is a brief introduction to someone testing out the software for the first time Take your time and follow the instructions precisely to familiarize yourself with the layout The first thing you ll see when you launch Listening Lab is the main win
17. of the signal before it is processed 1 MIC LINE 2 MUSIC The INPUT stage of Precision Ear looks like this l4 iE a infdB 0 0dB MAKE SURE YOUR AUDIO OUT SWITCH IS SET TO ON The MIC LINE fader is set to inf dB and is switched off If you wish to use a microphone or line level input simply connect the device to your sound card and make sure a signal is present on the hardware Click the red OFF button on the MIC LINE fader It will turn to a green ON button Lift the Fader SLOWLY to 0 0 dB being careful to turn it down if you hear feedback and you should see a signal present on the VU meter If you don t see a signal check your sound card settings to make sure you have selected the correct input Turn the fader back down before adjusting sound card settings to avoid feedback Refer to your sound card user manual for more information on obtaining a signal Once a good signal is obtained adjust the trim on the sound card so that the level is as high as possible without going over the peak level on the sound card s level indicator and without causing any distortion Using Music as Input Signal Most users prefer to use audio which has been converted to AIFF or WAV on the hard disk We recommend this as the most convenient way to play music through Listening Lab To select and play a sound file we use the playback section AIFF Aee It is recommended that you obtain good quality recordings
18. of time before each transition to the next frequency In other words this is the length of time that the session will remain on each frequency Numbers 1 to 7 correspond as follows 0 15 sec 1 20 sec 2 1 min 3 2 min 4 4 min 5 8 min 6 16 min T 32 min Selecting the frequencies as described above for the first two boxes and selecting number 2 for the third box means that the filter will move between 1000 Hz and 4000 Hz in stepwise fashion at 1 minute intervals 4 Digit describes the pattern which the sweeping filter will follow 0 Up Down Repeat 1 Up Down Stop Down Up Repeat 3 Down Up Stop 4 Up Stop 5 Down Stop 6 Stop f Stop 8 Band Pass Filter 13 Some example session codes 6607 Remains stopped on 3000 Hz for the duration of the program 6 3000 Hz 6 3000 Hz 0 15 second intervals 7 Stop 0834 Moves up in steps every 2 minutes from 0 Hz to 6000 Hz and then stops 0 0 Hz 8 6000 Hz 3 2 minute intervals 4 Up Stop 0440 Moves continually stepwise up and down between 0 Hz and 1500 Hz taking one step every 4 minutes 0 0 Hz 4 1500 Hz 4 4 Minute intervals 0 Up Down Repeat Input the numbers and press START after checking the BALANCE button The little number box to the right of INPUT PROGRAM displays the current frequency number so you can see the progress of the session In addition the program effect is visible on the spectrum analyser at the bottom of the window You will h
19. so specify the settings required for the filters gates etc The four digit program input code is for the final filtration of the signal A typical code will specify two frequencies between 0 and 8000 Hz When the session is started a high pass filter will sweep in steps with the specified frequencies at its center at a specified rate and in a specified pattern There are four digits Each digit has a different meaning and the meanings are specified below 1 Digit is for frequency 1 or the lower frequency of the range 2 Digit is for frequency 2 or the higher of the range These two digits go from 0 9 and the frequencies correspond as follows 0 0 Hz 1 500 Hz 2 750 Hz 3 1000 Hz 4 1500 Hz 5 2000 Hz 12 6 3000 Hz he 4000 Hz 8 6000 Hz 9 8000 Hz 10 12000 Hz So selecting 3 in the first box and 7 in the second box defines the session range as going from 1000 Hz to 4000 Hz When you start the session the center frequency of the high pass filter will be 1000 Hz so all frequencies below 1000 Hz will be attenuated with a 15 dB octave roll off After a specified time the center frequency will jump up to 1500 Hz and so on until reaching 4000 Hz What happens after that depends on the pattern selected Note that if you select a higher frequency in the first box by mistake Precision Ear will swap the values Also if you wish to remain on one frequency you should select the same number in both boxes 3 Digit is for units
20. srite Scarlett 2 in 2 out The last item on the list is not required for passive sessions but is essential if you wish to process the patient s voice Conventional on board sound cards have high latency and are too noisy for this purpose Installation Instructions Insert the Listening Lab CD into your CD ROM or DVD ROM device If the installation does not start automatically open the disc path in explorer e g D and double click setup exe Read the license agreement carefully and enter your 10 digit password found on CD sleeve when prompted Piracy Thank you for buying your copy of Listening Lab legitimately Please respect our efforts in developing the software by ensuring that no one attempts to make illegal copies of it If you know of anyone copying Listening Lab please email sdkarssen gmail com with full details Running Listening Lab Once installed simply select Listening Lab from the programs list on the Start Menu or double click the Desktop Shortcut Uninstalling Listening Lab To Uninstall select the uninstall option from the Listening Lab folder on the Start Menu How Does Listening Lab Work Listening Lab is a digital audio processor In other words it processes an audio signal for use in listening therapy but instead of processing an actual line level signal the signal is first converted to a digital representation through a process called quantization All the processing takes place in t
21. will bring up a dialog particular to your audio driver You should follow the Latency ms 12 VO Vector Size Signal Vector Size 64 Scheduler in Overdrive Sampling Rate 44100 Hz manufacturer s instructions to obtain the best possible latency from the sound card and in Audio Interrupt CPU Utilization 2 CPU Limit 0 Overload 0 then write down the latency in milliseconds You will need to enter this latency figure into the latency box if you are using a Signals Used Function Calls 0 x Vector Optimization microphone for your listening program Parallel Processing Enable Mixer Crossfade Off Crossfade Latency b ms If you hear a clicking noise in your Ramp Time 10 ms headphones during your use of Listening Lab then you will need to return to Audio Driver input Channels 2 Output Channels 2 Channel 1 Channel 2 Channel 1 1 Left 1 Lett 2Right Channel 2 2 Right Setup in the configuration and increase the buffer size of your sound driver Record the Audio Driver Setup 1 0 Mappings new latency value Close the Audio Status window Click the button next to AUDIO OUT which says OFF It will turn to a green ON and the red OFF signs on the output faders will also change to ON Input Setup The INPUT section of Precision Ear sets the level

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