Can anyone help?

I have some iso files that contain multi-channel music tracks. I want to extract the files & convert them to a format I can play (e.g. FLAC, DFF, DSF, WAV etc.). I can extract the files but they are named TRACK01.MCH, TRACK02.MCH and so on; presumably MCH stands for multi-channel. Unfortunately, I cannot find a player, converter or decoder that will handle this format.

Any assistance gratefully appreciated.