Sound Cards – Digigram UAX220

This sound card is very easy to use; there is no driver to install, and the only controls on the box are for adjusting the headphone level and a push-button for toggling the input signal monitor. The push-button must be set in off position.

A disadvantage is that to measure the system delay, the right channel input and output must be connected. We also had problems with gaps in the measurement and to avoid this we had to restart the PC.

For a link with information click the help button. Click the Next > button to continue.

The sound card Output level is controlled by the default software mixer in WinMLS.

The input level cannot be controlled from WinMLS.

The input level and output level are calibrated. To see how the calibration is done, click help.

WinMLS is in this setup set to measure the correct system delay using a loop-back in right channel. (The system delay allows you to find the distance from the loudspeaker to the microphone)

Because of this reason, right channel input (IN R) must be connected to the right channel output (OUT R).

For more information about this, go to Measurement→System Delay… and click the help button.

Click the Next > button to continue.

The frequency response (magnitude) of this sound card is within 0.1 dB in the frequency range 20 Hz–20 kHz.

If you want to correct for this, click help. This will also correct for the 40 samples delay and give you a correct system delay.

If you have problems getting the sound card to work, try reloading the setup.

If you have problems with the measurement repeating itself and telling that "synch signal is not found", restart the PC and do this:In the control panel, System, Advanced Tab, Performance Settings, Advanced Tab, make sure that Adjust for best performance of is set to Background services.

We had problems with gaps in the measurement and to avoid this we had to restart the PC.