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.

Changes:

CD Ripper
Compilation tag (also used in naming) taken from compilation check, not by checking for differing artists
When create a new profile offers to use the current one as template
Compilation, conductor & style tags created by default
All meta data items are shown in meta section, excluded (for id tags) are shown in light gray
All meta data items list shows [x] instead of [Remove]
If the option to disable autoplay is enabled, then every second the status of the CD drive is polled, to autorefresh when CD is inserted, auto press eject button when CD draw is open, also stops windows autoplaying the CD when closing CD ripper
Pressing the eject button when the draw is open, closes it
Auto eject CD should function more reliably

Win98 the convert window cli from CD ripper, or music converter was not closing after rip, plus was shown
Edit id tag (from right click >> edit tag) no longer locks explorer window whilst editing
Edit id tag displays common id elements blank if a track has no tags
Edit id tag - remembers the last position of the window + if window is large enough (starting from last time only), the elements have extra room to show
Naming added [length_mmss], [length_hhmmss], [composer] & [conductor]
Reference: Pro Frequency Conversion enabled by default
All programs: if running in debug mode, the debugging information will show even if program crashes
Music Converter: No longer creates ARTIST id tags for naming if one does not exist (TITLE is created from filename if does not exist)
Audio Properties page: Visually more smarter
Wave decoder - if a wave file is PCM then does not use the fact chunk (could be wrong)