For the mean time I will keep on discovering new ways on how to compress it with out sacrificing the quality of the audio.
Unless you go for a specifically lossless algorithm, quality is bound to suffer.
Lossless formats (Monkeys, FLAC, etc.) wil retain the quality, but are not capable of producing the small files of the lossy methods.
Very generally speaking, lossy formats will result in files around 1/10th of the original size, whereas lossless systems only manage around 1/2 .