Sony PCM-A10 Help Manual page 242

Help Guide
Linear PCM Recorder
PCM-A10
You cannot control the volume of the Bluetooth audio device.
Depending on the connected Bluetooth audio device, you may not be able to control the volume of the Bluetooth
audio device from your linear PCM recorder.
Depending on the connected Bluetooth audio device, volume control in Standard Mode may not be supported.
Disconnect the Bluetooth connection and select [
Mode] from the HOME menu. Then, re-establish the Bluetooth connection and control the volume once again.
Bluetooth] - [Audio Device] - [Volume Control] - [Enhanced
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