Creating a Multichannel Audio Output Configuration

This procedure shows how to create channels to set up a Multichannel audio output configuration, or to edit an existing configuration.

Note: The recommended number of channels is 4, with angular spacings between 20 and 90°, and the maximal number is 12.
  1. Select the Settings tab.
  2. Click the Speaker setup button to open the Audio output configuration window.
  3. If the audio output is turned on (), click the speaker button to turn it off.
  4. Click the Multichannel button to select this audio output mode.
  5. Click to add a channel.
    A new channel appears in the Audio output configuration window.
  6. In the Type column, select the channel type.
  7. To change the speaker's position and gain:
    1. Click the value in the Distance (m) column to open the Value window.
    2. Use the slider, or the + and - buttons, to set the distance of the speaker in meters from the reference position, then close the Value window.
    3. Click the value in the Angle (°) column.
    4. Use the slider, or the + and - buttons, to set the angle of the speaker in degrees, then close the Value window. You can check the speaker's position in Audio output configuration window.
    5. Click the value in the Gain (dB) column.
    6. Use the slider, or the + and - buttons, to set the output gain of the speakers in dB, then close the Value window. Alternatively, all speaker gains can be set and/or checked in the Output gain window that is opened when you click the Output gains button at the top of the Gain (dB) column.
    Note: The Distance (m) setting has no influence on the output gain of each speaker. Indeed, the spatialization algorithm does not compensate for the level difference, as heard at the reference position, between 2 signals coming from speakers with different distances. This is because the listening environment (reverberation, absorption, obstacles, etc.) can strongly influence the level actually perceived at the reference position, which makes the required gain correction difficult to analytically predict.

    In the case where some speakers are at different distances from the reference position, the level differences should be compensated for with the Gain (dB) settings.

    For example, you can use any sound function in ASDforEV as a test source by changing its azimuth angle to test different directions (see Configuring an ADAS or HMI Sound Function) and making sure with each speaker’s Gain (dB) setting that it is heard as loud whatever the direction.

  8. If you want to save the Multichannel audio output configuration, click the Save button , enter a file name, and click OK.
  9. If you want to load a previously saved audio output configuration, click the Load button , and select the previously saved file.
    Tip: To remove the last channel added to the Multichannel configuration, click .

You can now check the sound, and, if needed, correct the frequency response(s).

You can also Export Audio Configuration Data.