Sony PCG-SRX99 VAIO User Guide (primary manual) User Manual page 78

To adjust sound volume in the Recording Control window
When Microphone or Stereo Out are not displayed in the Recording Control window, do the following:
1.
Select Options and click Properties.
2.
Click the item you want to display in Control.
3.
Click OK.
You can only adjust the recording volume in the Recording Control window in step 3. If you adjust the volume in step
1, the adjustment is only effective for playing sound. It does not adjust the volume for recording sound.
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