Generic Standard file in CPC music. Really is a compressed [[YM]] file.
The "plain" YM format can not be played on CPC, because it uses LHA packing which is not unpackable in realtime. You need the AYC toolkit or YMcruncher to convert them to AYC, then you should be able to play them with various tools.
You can extract (rip) CPC music (or from another 8-16bit system) with your emulator to YM file and convert to AYC file to use it on CPC.
The author of this great idea is [[Madram]] from [[Overlanders]].