Sony PCM-D10 Help Manual page 63

Follow steps 3 through 7 in
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To record in monaural, press the OPTION button while recording is on standby to display the OPTION menu,
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select [Stereo/Monaural] - [Monaural (L)], and then press
Note
When a device is connected to the XLR/TRS jack(s) and either or both of the left and right XLR/TRS INPUT LEVEL switches are placed
in the [LINE] position, the LIMITER and LCF(Low Cut) functions do not work.
Before connecting or disconnecting an external microphone or device, make sure that the phantom power switch is placed in the [OFF]
position. If you plug or unplug the cable of the connected device while the switch is placed in the [ON] position, it may produce a loud
noise or cause the device to malfunction.
While the phantom power switch is placed in the [ON] position, the linear PCM recorder consumes more power. When you do not intend
to use an external microphone with phantom power support, slide the switch to [OFF].
Recording with the built-in microphones
4-744-529-11(2) Copyright 2018 Sony Corporation
to start recording.
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