Looks like ffmpeg can not process it because files lack some geob binary
chunk that it expects.
When inspecting files I found out similar binary chunks that appears to
contain same data but at different layout.
I downloaded old SonicStage and will try to find out if its OpenMG binary
code have any
Okay, thank you!Maybe it's worth noting that I extracted the .oma files
directly from the hard drive of my old Sony NW-HD1. My walkman was dead but I
wanted to recover the audio files so I demounted the hard drive and was able to
find an adapter on Amazon to transfer the files directly from the
