The BASS audio engine works great, can encode/decode streams, samples, and even create its own. With plugins works with .wma, and without, supports MP3, MP2, MP1, OGG, WAV, AIFF, also supports MOD Music, XM, IT, S3M, MOD, MTM, UMX, MO3 Music (MP3/OGG compressed MODs) and is all under 100kb in size. It takes some effort to get working, and for some features requires a {$mode delphi} switch, but otherwise, works perfect.