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9.1.2 Setting recording quality
9.1.3 Setting microphone sensitivity
9.1.4 Enabling noise reduction
9.1.6 Enabling/disabling voice-activated recording
9.1.8 Enabling/disabling the record indicator
9.2.2 Adjusting the display contrast
9.2.3 Enabling/disabling the background light
9.3.3 Enabling/disabling key and signal tones