gives the master volume for all output lines and can be given a value from 0 to 65535. We recommend that you set it to 65000 (or exactly to the maximum value 65535). If you have problems with distortion on your sound card output, then you should try setting it to a lower value.
The output tone controls Treble and Bass found on the left side of the figure above can be set to a number between 0 and 100. This setting will greatly affect the frequency response of your sound card. You may use this as an equalizer to boost either the high or the low frequency region.