Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 275)

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Figure 53. Sounds and Multimedia Properties
Setting PC Microphone Input for Recording (Windows 98)
Use the following procedure:
1. Select Start->Settings->Control Panel->Multimedia Properties to open the Multimedia Properties window.
2. Select the “Audio” tab and then the “Recording” icon to open the Recording Control window.
3. Select Microphone as input, and adjust the balance and volume.