Open Source
Aurio: Audio Fingerprinting Library for .NET
An audio processing and retrieval library for .NET with a focus on fingerprinting algorithms. It features excellent implementations of 4 of the most well known fingerprinting methods (Shazam, Philips, EchoPrint by EchoNest/Spotify, ChromaPrint of MusicBrainz), along with a high-performance audio processing pipeline and many other audio processing functionality. It also serves as a toolbox to develop managed audio processing algorithms and tools, including custom fingerprinting methods.
The library is licensed under the AGPLv3 and available for free. Protyposis provides commercial support, development and custom licensing.
AudioAlign: Automatic Synchronization of Media Recordings
Software for the automatic temporal synchronization of any number of audio and video clips. Based on Aurio and licensed under the same terms.