Ringtone Makers Can't Read Music Files

Steve Hall

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Apr 12, 2012
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I'm trying to create custom ringtones from the music files on my Galaxy Nexus running Android 4.4.2 (CM 11 build date 09-Jan-2014). Most, if not all, of my music is in M4A format, so I made sure the ringtone makers I've tried support that format.

The apps play the music files just fine, but when I try to open any file for editing, no matter what app I use, I get "Error reading file" or a variation thereof. The files were transferred from my Windows 8.1 computer to my phone via Winamp (USB, not wifi).

Does anyone have any suggestions on how to resolve this, short of wiping all the music and transferring WAV or MP3 files?

Thanks in advance!