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Troubleshooting
If you experience difficulties, read this section first. It contains tips on how to resolve various problems.
Cannot close the connection with the R-4 Pro
When using Windows and if Explorer or any other software referencing the R-4 Pro’s hard disk is open
when you attempt to close the USB connection between the R-4 Pro and your computer, the error message
“An error occurred while removing USB mass storage device – Unable to close device ‘unspecified volume.’
Please execute Stop Device again later.” appears, and you will be unable to disconnect the R-4 Pro.
Close all software or windows that are referencing the R-4 Pro’s hard disk. Then execute “Safely remove
hard disk” once again.
External memory device connected in the R-4 Pro is not visible from
the computer
The external memory device inserted in the R-4 Pro cannot be viewed from the computer. Consequently,
you cannot manipulate projects on the external memory device.
Cannot record
You cannot record correctly if the input level specified with the input level knobs is too low. Please set the
input level correctly.
Refer to: “Adjusting the input level” (p. 31)
When recording from connected mics, make sure that the mics are properly connected to the XLR input
connectors.
Also check the setting of the phantom power switch.
Refer to: “Phantom power switches [PHANTOM POWER]” (p. 10)
You cannot record correctly if the Input Select system setting is wrong.
Refer to: “System setup” (p. 64)
Strange sounds are heard during the recording
If recording with the internal mics, you may hear metallic or mechanical clicks in the recording. These
sounds are the operating noises of the R-4 Pro’s internal hard disk. Due to how the R-4 Pro is constructed,
the hard disk operating sounds may affect the recording.
You can alleviate this somewhat by using the Graphic EQ effect on the REC side to lower the 2 kHz and 4
kHz levels.
Recorded audio is distorted
The audio is distorted if the input level is too high. Refer to “Adjusting the input level” (p. 31), and use
the input level knobs to adjust the level appropriately.
In some cases, the sound may be distorted because an effect has been applied while recording. You should
adjust the input level with the effect applied. Adjust the effect parameters so that distortion does not
appear.

Computer-related problems

Recording-related problems

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