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OPTIMOD-PC
Both mixers are functionally identical. They have four inputs:
•
Analog Left/Right
•
Digital 1 Input
•
Digital 2 Input
•
WAVE Out from PC.
About the Interaction between the OPTIMOD-PC Input Mixers
and the Microsoft Windows Mixer
Most PCs have a master WAVE volume control that you can access from the speaker
icon in the System Tray (Figure 2-8). If you are using the OPTIMOD-PC as your com-
puter's default sound card, OPTIMOD-PC's driver defeats the MS Mixer's Wave In
Volume (Figure 2-9), forcing it to full gain. This attempts to ensure that the
OPTIMOD-PC I/O Mixer's gain is calibrated correctly. The reason it cannot predictably
do this is that there is another WAVE gain control in series with the master volume
control. This control is located in the Windows Mixer.
Right clicking the speaker icon and choosing Volume opens the Windows Mixer. This
mixer has several controls. One is the Output control, which is the same control that
appears when you click the speaker icon and (to repeat) is defeated by the
OPTIMOD-PC driver. The other controls are typically (1) WAVE (the culprit men-
tioned above), (2) Music Synthesizer, and (3) CD Player controls. Your computer's
operating system sums the outputs of these controls; their sum is the WAVE signal
applied to the WAVE inputs in the OPTIMOD-PC I/O Mixer.
Figure 2-8: MS Mixer Output
2-25
INSTALLATION
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