NAudio.WinMM 3.2.0-preview.1

NAudio.WinMM

Nuget

Windows Multimedia (WinMM / winmm.dll) bindings for NAudio. Windows-only (net9.0-windows).

What's included

  • Playback — WaveOut for playing audio via the legacy WinMM API. The window-callback variant lives in NAudio.WinForms as WaveOutWindow
  • Recording — WaveIn for capturing audio from input devices. The window-callback variant is WaveInWindow in NAudio.WinForms
  • MIDI I/O — MidiIn / MidiOut for sending and receiving live MIDI messages
  • ACM — Audio Compression Manager wrappers: AcmStream, AcmMp3FrameDecompressor, driver enumeration
  • Device enumeration and capability queries for WinMM audio and MIDI devices

When to use it

Use this package when you need the classic WaveOut/WaveIn APIs — useful for broad compatibility with older Windows versions, for very simple playback/capture, or when you specifically want ACM codecs. For lower-latency playback, system loopback capture, or modern device enumeration prefer NAudio.Wasapi.

See the NAudio documentation site for tutorials and the full API reference, or the GitHub repository for full documentation and tutorials.

License

MIT.

Showing the top 20 packages that depend on NAudio.WinMM.

Packages Downloads
NAudio
NAudio, an audio library for .NET
 23
NAudio.WinForms
Package Description
 22
NAudio
NAudio, an audio library for .NET
 21
NAudio.WinForms
Windows Forms audio controls and window-callback variants of WaveOut/WaveIn for the NAudio audio library.
 21
NAudio.WinForms
Package Description
 21
NAudio
NAudio, an audio library for .NET
 20
NAudio.WinForms
Package Description
 20
NAudio.WinForms
Windows Forms audio controls and window-callback variants of WaveOut/WaveIn for the NAudio audio library.
 20
NAudio.WinForms
Package Description
 19
NAudio
NAudio, an audio library for .NET
 18
NAudio.WinForms
Package Description
 18

  • Deprecated legacy APIs that have modern replacements: Wave16ToFloatProvider, WaveFloatTo16Provider and Wave32To16Stream (use ToSampleProvider() / ToWaveProvider16()), IgnoreDisposeStream (no longer needed), ByteArrayExtensions (use the BCL), MidiMessage (use the typed MIDI events), ResamplerDmoStream/DmoResampler (use MediaFoundationResampler or WdlResamplingSampleProvider), DmoEffectWaveProvider and the Dmo* effects (use NAudio.Effects), AsioOut's recording path (use AsioDevice), WaveFilter, and ProgressLog. Added AsioOut.IsSupported() and deprecated the lowercase isSupported()
  • Deprecated WaveFileReader.ReadNextSampleFrame in favour of ToSampleProvider(), which supports more formats and doesn't allocate an array per sample frame
  • Fixed WaveFileWriter.WriteSample and WriteSamples(short[]) throwing for plain (non-extensible) 32-bit integer PCM formats
  • WaveFileReader.ReadNextSampleFrame now throws InvalidDataException for a WAV header with an invalid channel count or bit depth
  • Reduced allocations when reading and writing WAV files, added ReadOnlySpan<byte> overloads of WaveFileWriter.AddChunk and ChunkIdentifier.ChunkIdentifierToInt32, and fixed WaveChunks.GetData leaving the stream position changed when a read fails. ChunkIdentifierToInt32 now throws ArgumentOutOfRangeException for identifiers that aren't four bytes (#1457)
  • Changed the WaveStream.CurrentTime setter to clamp to the bounds of the stream, and corrected the XML documentation for the core audio interfaces (#1441)
  • Fixed DirectSoundOut failing every playback with DirectSoundException 0x80004001 (or an ArgumentException for a format with extra data, e.g. one read from a WAV by WaveFileReader): the secondary buffer's WAVEFORMATEX was still a GCHandle-pinned WaveFormat instance — a site missed in the #1432 marshalling conversion, since WaveFormat no longer carries [StructLayout] — and now marshals via WaveFormat.MarshalToPtr
  • Fixed WasapiPlayer and WasapiOut being stranded in the Playing state, unable to play again, when the source's Read threw or the source ended before the first buffer was filled (#1442)
  • macOS support (preview) - A new wrappers library is added wrapping macOS native API's for playback/recording, reading/writing files and resampling audio. The NAudio.MacOS package ships pre-release only (X.Y.Z-preview.N) while its API settles, so it stays pre-release alongside stable releases of the other packages. Special thanks to @mdcdi1315 (#1325) for the work and the tests. For more information, see the design doc that describes the decisions that helped shape the wrappers. (#1398)
  • Reworked the macOS CoreAudioPlayer and CoreAudioRecorder non-interleaved path, used for devices that expose one mono stream per channel; the recorder now also drains buffered audio when stopped, and non-interleaved streams carrying more than one channel are rejected explicitly (preview) (#1461)
  • ExtendedAudioFileServicesReader.CurrentTime and TotalTime on macOS now throw ObjectDisposedException after the reader is disposed, rather than a native exception (preview) (#1451)
  • VB.NET support - Added SampleProviderBase and WaveProviderBase, base classes that keep the NAudio 2 Read(buffer, offset, count) signature for languages that cannot name a Span<T> in a method signature, and a Using NAudio from VB.NET guide covering playback, recording and custom providers from VB (#1426)
  • Refreshed the NuGet package icon, now rendered from the new SVG version of the NAudio logo as a sharper, square 256×256 PNG (#1467)

.NET 9.0

Version Downloads Last updated
3.3.0-preview.1 1 10/18/2026
3.2.0 1 10/16/2026
3.2.0-preview.1 3 10/14/2026
3.1.1-preview.2 11 09/22/2026
3.1.1-preview.1 13 09/09/2026
3.1.0 10 09/07/2026
3.1.0-preview.2 13 09/06/2026
3.1.0-preview.1 11 09/06/2026
3.0.2-preview.2 11 09/01/2026
3.0.2-preview.1 12 08/21/2026
3.0.1 14 08/19/2026
3.0.1-preview.1 14 08/19/2026
3.0.0 17 08/19/2026
3.0.0-preview.20 16 08/11/2026
3.0.0-preview.19 14 08/06/2026
3.0.0-preview.18 15 07/18/2026
3.0.0-preview.17 19 07/16/2026
3.0.0-preview.16 14 07/01/2026
3.0.0-preview.15 7 09/15/2026
3.0.0-preview.14 6 09/15/2026
3.0.0-preview.10 3 09/25/2026
3.0.0-preview.9 3 09/10/2026
3.0.0-preview.8 3 09/15/2026
3.0.0-preview.7 3 09/15/2026
3.0.0-preview.6 3 09/25/2026
3.0.0-preview.5 3 09/17/2026
3.0.0-preview.4 4 09/09/2026
3.0.0-preview.3 5 09/15/2026
3.0.0-preview.2 5 09/09/2026
2.4.0 12 09/01/2026
2.3.0 22 05/30/2026
2.2.1 20 05/30/2026
2.2.0 18 05/30/2026
2.1.0 20 05/30/2026
2.1.0-beta.1 19 05/30/2026
2.0.1 21 05/30/2026
2.0.0 18 05/30/2026
2.0.0-beta2 21 05/29/2026
2.0.0-beta1 19 05/30/2026