Provides applications running on Pentium-class PCs under MS Windows 9x/NT/2000 with a MIDI-controlled, low-latency, fully programmable wavetable module implemented entirely in software. [Commercial]

Provide Win32 static linked codec libraries with source code implementing ITU G.722, G.723.1, G.729a, G.726, and G.728. Also provide audio arithmetic such as AEC, VAD, AGC, VoiceXML. [Commercial]

A free (LGPL-ed) and open source, cross platform audio library used for 3D and 2D sound.

FMOD is a programming library and toolkit for the creation and playback of interactive audio. It supports all leading operating systems and game platforms.

A sound engine for Windows. It provides powerful sample, streaming, and module playback functions and can be used with and without DirectSound. It distributed in two forms: static (.lib) or dynamic (.dll) libraries.

An audio system with network support and provides the ability to use stereo, 3D audio, Doppler effects, music playing (MIDI, HMP, MUS), and CD playing and ejecting/changing. [Open source, BSD License]

Sound libraries for the PC-DOS platform.

A high-quality IT/XM/S3M player library. Versions 0.9+ will have MOD support. An add-on is available for playing OGG files. [Freeware]

The control of volume is realized by the u32 library. The library can work in all the MS Windows versions (95, 98, ME, NT, 2000 and XP). [Commercial]

DRC generates digital room correction FIR filters to be used within HiFi systems in conjunction with real time convolution engines like BruteFIR. [Aladdin Free Public License (AFPL)]