Sony MHC-V73D Help Manual page 162

Help Guide
Home Audio System
MHC-V73D
There is noise, skipping, or distorted sound during USB playback.
Turn off the system and reconnect the USB device, then turn on the system.
The music data itself contains noise, or the sound is distorted. Noise may have entered during the transfer process.
Delete the file, and try transfer again.
The bit rate used in encoding an audio file was low. Send an audio file with higher bit rate to the USB device.
Related Topic
Turning the power on
Turning the power off (Standby mode)
Connecting with a USB device
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