Windows
Media Audio encompasses multiple codecs into one:
- Windows Media Audio Lossless
- Windows Media Audio (a lossy codec)
- Windows Media Audio Professional (lossy higher quality than
standard)
- Windows Media Audio Voice
- ACLEP.net (low bit rate, voice optimized)
Different versions of WMA are confusing to say the least, not
least because they do not go up in consecutive version numbers.
Windows Media Audio v2 was the first, then v4, v7, v8, v9, v9.1 (and
v9 PRO), v9.2 and v10 PRO.
Windows Media Audio 9.2 (not voice, lossless or
professional) is backwards compatible with all playback devices.
Newer lossless, voice and professional require new decoders (very
few portable players will play these).