Yamaha RM-CR Reference Manual page 15

[For Windows]
Open the Sound Control Panel, and then confirm that [Yamaha RM-CR] is set to [Default Device] on the [Playback] and
[Recording] tabs. Otherwise, select [Yamaha RM-CR], click [Set Default], and then click [OK].
NOTE: Adjust the microphone sensitivity (input volume) as necessary. Select [Yamaha RM-CR] on the [Recording] tab, and
then click [Properties] to open the [Echo Cancelling Speakerphone Properties] window. Click the [Levels] tab to
display the adjuster.
RM-CR Reference Manual
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