NAudio.Dmo
3.2.0
Prefix Reserved
See the version list below for details.
dotnet add package NAudio.Dmo --version 3.2.0
NuGet\Install-Package NAudio.Dmo -Version 3.2.0
<PackageReference Include="NAudio.Dmo" Version="3.2.0" />
<PackageVersion Include="NAudio.Dmo" Version="3.2.0" />
<PackageReference Include="NAudio.Dmo" />
paket add NAudio.Dmo --version 3.2.0
#r "nuget: NAudio.Dmo, 3.2.0"
#:package NAudio.Dmo@3.2.0
#addin nuget:?package=NAudio.Dmo&version=3.2.0
#tool nuget:?package=NAudio.Dmo&version=3.2.0
NAudio.Dmo
DirectX Media Object (DMO) and DirectSound support for NAudio. Windows-only (net9.0-windows).
What's included
- DMO effects (obsolete as of 3.2; use the managed effects in
NAudio.Effects) —DmoEffectWaveProvider<TEffector, TParam>with built-in wrappers for the Windows audio effect DMOs (echo, chorus, compressor, distortion, flanger, gargle, I3DL2 reverb, param EQ, waves reverb) - DMO MP3 decoder —
DmoMp3FrameDecompressor(IMp3FrameDecompressorimplementation backed by the Windows Media MP3 Decoder DMO) - DMO resampler stream (obsolete as of 3.2; use
MediaFoundationResamplerorWdlResamplingSampleProvider) —ResamplerDmoStream(wraps the wmcodecdsp resampler as aWaveStream) - DMO enumeration —
DmoEnumeratorfor discovering installed audio DMOs - DirectSound playback —
DirectSoundOut, the legacy DirectSound output path
When to use it
DMO and DirectSound are legacy Windows audio APIs. Reach for them when targeting older code paths that already rely on DirectSoundOut or the DMO MP3 decoder. For effects, NAudio.Effects (in NAudio.Core) now provides managed, cross-platform equivalents. For new code, prefer MediaFoundationResampler (in NAudio.Wasapi) over ResamplerDmoStream, and WasapiPlayerBuilder over DirectSoundOut.
This package was carved out of NAudio.Wasapi for NAudio 3 so consumers who only want WASAPI / MediaFoundation don't transitively pull DMO and DirectSound interop.
See the NAudio documentation site for tutorials and the full API reference, or the GitHub repository for full documentation and tutorials.
License
MIT.
| Product | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net9.0-windows7.0 is compatible. net10.0-windows was computed. |
-
net9.0-windows7.0
- NAudio.Core (>= 3.2.0)
NuGet packages
This package is not used by any NuGet packages.
GitHub repositories
This package is not used by any popular GitHub repositories.
| Version | Downloads | Last Updated |
|---|---|---|
| 3.4.0-preview.1 | 0 | 10/24/2026 |
| 3.3.0 | 217 | 10/19/2026 |
| 3.3.0-preview.1 | 57 | 10/17/2026 |
| 3.2.0 | 3,708 | 10/15/2026 |
| 3.2.0-preview.1 | 82 | 10/13/2026 |
| 3.1.1-preview.2 | 272 | 9/21/2026 |
| 3.1.1-preview.1 | 473 | 9/8/2026 |
| 3.1.0 | 44,254 | 9/7/2026 |
| 3.1.0-preview.2 | 114 | 9/5/2026 |
| 3.1.0-preview.1 | 94 | 9/4/2026 |
| 3.0.2-preview.2 | 163 | 8/27/2026 |
| 3.0.2-preview.1 | 166 | 8/20/2026 |
| 3.0.1 | 33,765 | 8/18/2026 |
| 3.0.1-preview.1 | 120 | 8/17/2026 |
| 3.0.0 | 2,013 | 8/15/2026 |
| 3.0.0-preview.20 | 532 | 8/8/2026 |
| 3.0.0-preview.19 | 535 | 7/25/2026 |
| 3.0.0-preview.18 | 398 | 7/16/2026 |
| 3.0.0-preview.17 | 140 | 7/11/2026 |
| 3.0.0-preview.16 | 455 | 7/1/2026 |
A feature and tidy-up release. Its headline is a first preview of macOS
support: the new `NAudio.MacOS` package wraps Core Audio for playback and
recording, Extended Audio File Services for reading and writing compressed
formats, and AudioConverter for resampling. It ships pre-release only while its
API settles, alongside the stable versions of the other packages. VB.NET users
also get base classes and a guide that keep the NAudio 2 array-based `Read`
signature.
Several legacy APIs that have modern replacements are now `[Obsolete]`, to be
removed in the next major version. The
fixes include `DirectSoundOut`, which failed every playback in 3.1.0, and
`WasapiPlayer`/`WasapiOut` getting stuck in the `Playing` state after a source
error.
* **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](Docs/Architecture/MacOSWrappersDesign.md) doc that describes the decisions that helped shape the wrappers. (#1398)
* **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](Docs/UsingNAudioFromVB.md) guide covering playback, recording and custom providers from VB (#1426)
* 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()` (#1466)
* Deprecated `WaveFileReader.ReadNextSampleFrame` in favour of `ToSampleProvider()`, which supports more formats and doesn't allocate an array per sample frame (#1465)
* 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)
* 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` (#1456)
* 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)
* Fixed `WaveFileWriter.WriteSample` and `WriteSamples(short[])` throwing for plain (non-extensible) 32-bit integer PCM formats (#1463)
* `WaveFileReader.ReadNextSampleFrame` now throws `InvalidDataException` for a WAV header with an invalid channel count or bit depth (#1464)
* Changed the `WaveStream.CurrentTime` setter to clamp to the bounds of the stream, and corrected the XML documentation for the core audio interfaces (#1441)
* 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)
* Refreshed the NuGet package icon, now rendered from the new SVG version of the NAudio logo as a sharper, square 256×256 PNG (#1467)
* Fixed the Help and About links in the AudioFileInspector, MidiFileConverter and MixDiff sample apps, which threw on .NET 9 instead of opening the help page or browser, and pointed the links and help pages at GitHub rather than CodePlex (#1469)