Sound Libraries

There are several sound libraries to choose from. irrKlang probably fits best for Irrlicht developers because it was created by the same people. Here is a comparison of all major sound engines:

Sound API Cost Platforms Modes File Formats Plugins
IrrKlang 65-390€, free for non-commercial Windows, Linux, Mac 3D, 2D MP3, OGG, WAV, FLAC, MODs * yes
Audiere LGPL Windows, *nix 2D only MP3, OGG, WAV, FLAC, MODs* no
FMod 1000-4000$ per project, free noncommercial Windows, Linux, WinCE, Mac, PS2, XBox, GameCube 3D, 2D MP3, OGG, WAV, AIFF, MODs, WMA* yes
OpenAL LGPL Windows, Mac, Linux, BSD, Solaris, IRIX, PS2, PS3, XBox, XBox360, GameCube 3D, 2D Wav, OGG, MP3 <-- Via Extension AL_EXT_MP3 No?
Bass 100-950€ per project, free noncommercial Windows 3D, 2D MP3, OGG, WAV, AIFF, MODs* yes
SFML-Audio zlib Windows, Mac, Linux 3D, 2D ogg, wav, flac, aiff, au, raw, paf, svx, nist, voc, ircam, w64, mat4, mat5 pvf, htk, sds, avr, sd2, caf, wve, mpc2k, rf64 No?
SDL Mixer GPL, Ongoing latest: zlib Windows, Mac, Linux 2D ogg, wav, flac, mp3, MOD, MIDI yes
cAudio zlib Windows, Mac, Linux, iOS 3D, 2D MP3, OGG, WAV, RAW * yes
OAL Wrapper zlib Windows?, Mac, Linux 3D, 2D OGG, WAV no?

(* = And probably more file formats, for example because of plugin functionality or because the list would get too long because of other not that popular file formats)