Kawai CN34 Owner's Manual page 109

Headphones
Issue
The headphone volume is too low.
USB (memory device)
Issue
A USB memory device is not detected, cannot
be saved to, or does not appear to function
when connected to the 'USB to Device' port.
The instrument pauses briefly when connecting
a USB memory device.
USB (MIDI)
Issue
The instrument is connected to the computer
using a USB cable, however the software does
not respond to key presses.
MP3/WAV/SMF files
Issue
No sound can be heard when playing an MP3
or WAV audio file stored on a USB memory
device.
An MP3/WAV audio file stored on a USB
memory device sounds strange, or does not
play back correctly.
When recording MP3/WAV audio files, the
volume is too low/too high (distorted).
Possible Cause and Solution
If the 'Nominal Impedance' specification of the headphones is less than
100 Ω (ohms), set the 'Phones Volume' setting in the Basic Settings
menu to High.
Possible Cause and Solution
Check that the USB memory device is formatted to use the FAT/FAT32
filesystem, and not set to 'Write Protect' mode.
Disconnect the USB memory device, turn the instrument off then on,
then reconnect the USB device. If the USB device still does not function,
it may be damaged or incompatible. Please try using a different USB
device.
This is recognised behaviour when using very large capacity (e.g.
8GB+) USB memory devices.
Possible Cause and Solution
Check that a USB MIDI driver is installed on the computer.
Check that 'USB Audio Device' or 'KAWAI USB MIDI' is selected in the
software's input/output device settings.
Possible Cause and Solution
Check that the audio player volume is not set to 0.
Check that the format of the audio file is supported and listed in the
'Audio Player supported format specifications' table.
Check that the format of the audio file is supported and listed in the
'Audio Player supported format specifications' table.
The file transfer speed of the USB memory device may be too slow to
play the audio file. Please try using a different USB memory device,
ensuring that it conforms to USB2.0 Hi-Speed standards.
Check the 'Audio Recorder Gain' setting before recording the audio,
and if necessary adjust to increase/decrease the recording level.
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