Here's an MP3 I have.
- My iPhone plays it back with no problems.
- VLC on OS X plays it back with no problems.
- iTunes plays it with annoying bleeps and bloops, some kind of errors or artifacts that are very noticeable at the beginning of the track.
- Other OS X playback methods, like QuickTime Player or Quick Look, have tiny skips/gaps in the playback, in the same places where iTunes has the error bleeps.
The MP3 has a 32 kHz sampling rate instead of 44.1 kHz; is that the problem? When I use an OS X conversion tool like XLD, the tiny gaps are in the output, no matter what kind of conversion I do. Is the problem actually with the MP3 or with OS X/Core Audio?
This happens on multiple Macs running OS X 10.11.3 using iTunes 188.8.131.52.