dBpoweramp supports practically every audio type created: mp3, mp4, m4a (iTunes / iPod), wma, Ogg Vorbis, AAC, Monkeys Audio, FLAC, the list goes on....fully compatible with Windows Vista, 98 / ME / NT4 / 2000 and Windows XP.

Split into four components:
nicknamed the Swiss army knife of audio™:
CD Ripper: digitally rip audio CDs (secure, fast, AccurateRip),
Convert audio formats, preserve ID tags,
Explorer Integration: audio info tips & columns,
DSP Effects,
ID tag editing (Power Pack),
Free from nags**, popups, hidden spyware or bundleware.

Homepage: dbpoweramp.com