It is very simple: we want to produce only the music we like and we think it's interesting in some way, without any genre restrictions.
The fact that music is not produced on a physical support doesn't mean we don't care about quality; on the contrary we decided to use the
flac which is a
lossless format that means that it can reduce file size
without any quality loss. A decompressed flac file is 1:1 copy of the original audio file.
We also use the mp3 format but this is only because mp3 is de-facto standard of music on the net and it is easier to play on portable players and other devices like that.