NAudio Overview

NAudio is an open source .NET audio and MIDI library, containing dozens of useful audio related classes intended to speed development of audio related utilities in .NET. It has been in development since 2001 and has grown to include a wide variety of features. While some parts of the library are relatively new and incomplete, the more mature features have undergone extensive testing and can be quickly used to add audio capabilities to an existing .NET application.
NAudio demo project showing an MP3 file playing:

Latest News

26 June 2008 Version 1.2 Released. Read the release notes
28 Feb 2009 Lots of new stuff is being added and planned, so do check out the Source Code tab to have a sneak peak at what's coming in 1.3

NAudio Features

Play back audio using a variety of APIs
- WaveOut
- DirectSound
- ASIO (not currently working with all soundcards)
- WASAPI (Windows Vista Core Audio)
Decompress audio from different Wave Formats using ACM codecs
Record audio using WaveIn
Read and Write standard .WAV files
Mix and manipulate audio streams using a 32 bit mixing engine
Support for reading from a variety of audio file-formats including:
- MP3
- OGG
- SoundFont
- SFZ
- MIDI
Extensive support for reading and writing MIDI files
Full MIDI event model
Basic support for Windows Mixer APIs
A collection of Windows Forms Controls useful for .NET
Some basic audio effects, including a compressor

Projects Using NAudio

NAudio currently is used to support a number of audio related utilities, some of which may be moved to be hosted on CodePlex in the future. If you have used NAudio for a project, please get in touch so we can post it here.