• Quickstart
• Choose Audio Device
• Calibration

In the application menu, choose 'Tools' and then 'Configure Audio Input'. You will then see a popup window, where you should select 'Change': You will see another dialog window, where you can perform the necessary steps to choose your audio input device (in the indicated order):

(1) Choose an audio input device (the combo box on the screen lists all available audio input devices on your computer. Most probably, you will see one option that says 'Microsoft Sound Mapper - Input'. Unless you have several soundcards installed in your computer, this is your most resonable choice.)

(2) After you have specified a sound input device, you will be provided with a list of sampling rates that the selected audio input device supports. If the option is available, 22050 samples per second would be a good default choice.

(3) In most cases, your audio input signal will either be stereo, or mono on the left input channel. If by any reasons your microphone signal does only register on the right channel, select 'Audio == Right (1)'.

(4) After changing the audio input device, it is recommended to re-calibrate the system. Click on 'Calibrate' to get to the calibration routine. (please refer to the section 'Calibration' for further information.)

(5) Choose 'Ok' to accept the changes made, or 'Cancel' to revert to the previous settings.

Before you begin, make sure that

• your computer is in a non-reverberant room of reasonable size, and the sound source (i.e. most proably you) and the microphone are not too close to walls;
• you have an omni-directional microphone with flat frequency characteristics up to at least 5000 Hz;
• the microphone is at a fixed distance to the speaker's/singer's mouth, not closer than 5 cm, and not further than 30 cm;
• you have a sound pressure level meter (if you do not, you will have to 'cheat' during the calibration. Be aware that this will result in unreliable y-axis values on the voice range profile.)

For further information on meausrement conditions, please refer to the instruction 'Microphones and Room Acoustics and Their Influence on Voice Signals' provided by Svante Granqvist and Jan Svec.

In the application menu, choose 'Tools' and then 'Configure Audio Input'. You will then see a popup window, where you should select 'Calibrate': You will see another dialog window, where you can perform the necessary steps to calibrate audio input device (in the indicated order):

(1) Create a stable sound (i.e. by singing /a/ at a confortable pitch and loudness, but at a steady sound pressure level) for at least 10 seconds

(2) Immediately AFTER starting to produce the stable sound, click on 'Start'. Make sure that you are actually recording something, i.e. that you have chosen the proper audio input device, and that the microphone is switched on, etc. - The signal strength reading for channel 1 (indicated as * in the picture above) should be at least higher than -40 dB.

(3) Wait for about 5 seconds (still producing the steady sound), then click on 'Stop'. Terminate the steaty sound production AFTER you clicked on 'Stop'.

(4) In the field 'Calibration Value', specify the exact value that your sound pressure level meter measured during the steady sound production. (If you do not have a sound pressure level, you might specify a fictional SPL value of between 80 or 85 for confortable phonation and a mouth-to-microphone distance of 30 cm.)

(5) Click on 'Ok' to accept the new calibration settings, or on 'Cancel' to revert to the old settings.