precomp 0.45 will perform a heavy lossless compression on mp3 files
on the lowest api of course
alright i am going to give a long answer to this thread
there are 1 reason why a masked program for audio cant be implemented on games
meanwhile make no mistake, my masked project is ready to accept and use any kind of external program i personally use (ofr and packmp3 both compiled and optimized by me )
the reason is that games come with audio prepacked, this means you will need to extract audio into bnk format or web something format (i always forget the name :P )
and this means that my masks cannot handle it, mainly because they cant see the formats behind prepacked data
The 2 efficient ways to find and handle audio compression is with a pre-processor srep or msc are both pre-processors
and the other one is pre-compressor precomp or antiz are precompressors
those 2 ways scan, find and compress the audio files that you want 
I hope i got understood :P