• Confirm that the input source setting is not “Off”. (→Changing the recording file format for the built-in
XY mic, Setting INPUT 1/2 sources and phantom power)
Recorded sound cannot be heard or is very quiet
• Confirm that the input source setting is correct for the connected device. (→Setting INPUT 1/2 sources
and phantom power)
“MIC INPUT OVERLOAD!”, “INPUT 1 OVERLOAD!” or “INPUT 2 OVERLOAD!” messages
appear
• The volume input to the mic is too loud. Increase the distance between the mic and the sound source.
• Wind can cause loud noise to be input. We recommend using a windscreen if air is blown directly at
the mic , for example, when recording outdoors or when the mic is near the mouth of a speaker. (→
Reducing noise (low-frequency cut) )
Other trouble
The recorder is not recognized by a computer, smartphone or tablet even though
the USB port is connected to it.
• Use a USB cable that supports data transfer.
• The operation mode must be set on the M4 to allow the computer, smartphone or tablet to recognize it.
(→Using as a USB mic, Transferring files to computers and other devices)
• When using as a 32-bit float USB mic, confirm that the computer, smartphone or tablet and applications
being used support 32-bit float format.
• Even if “ZOOM M4” cannot be selected in the computer “Sound” settings, the M4 can still be used as a 32-
bit float USB mic if it is selected as the “Audio” or “Input/Output” device in an application that supports
32-bit float format.
• A driver is necessary to use 32-bit float format with Windows. Download the driver from the ZOOM
website (zoomcorp.com).
Battery operation time is short
Making the following settings could increase the battery operation time.
• Set the type of batteries used correctly. (→Setting the type of batteries used)
• Turn off inputs that are not being used. (→Changing the recording file format for the built-in XY mic,
Setting INPUT 1/2 sources and phantom power)
• Set the phantom power voltage to 24 V. (→ Changing phantom power voltage)
• Set the display to dim when not used for a certain amount of time. (→ Setting display power saving)
• Reduce the display brightness. (→ Setting the display brightness)
• Reduce the sampling rate used to record files. (→Setting the sample rate)
• Disconnect unnecessary cables from the PHONE OUT and LINE OUT jacks.
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