Melanchall.DryWetMidi 6.0.1

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.NET Standard 2.0 .NET Framework 4.5
There is a newer version of this package available.
See the version list below for details.
dotnet add package Melanchall.DryWetMidi --version 6.0.1
NuGet\Install-Package Melanchall.DryWetMidi -Version 6.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Melanchall.DryWetMidi" Version="6.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Melanchall.DryWetMidi --version 6.0.1
#r "nuget: Melanchall.DryWetMidi, 6.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Melanchall.DryWetMidi as a Cake Addin
#addin nuget:?package=Melanchall.DryWetMidi&version=6.0.1

// Install Melanchall.DryWetMidi as a Cake Tool
#tool nuget:?package=Melanchall.DryWetMidi&version=6.0.1

DryWetMIDI Logo


DryWetMIDI is the .NET library to work with MIDI data and MIDI devices. It allows:

  • Read, write and create Standard MIDI Files (SMF). It is also possible to read RMID files where SMF wrapped to RIFF chunk. You can easily catch specific error when reading or writing MIDI file since all possible errors in a MIDI file are presented as separate exception classes.
  • Send MIDI events to/receive them from MIDI devices, play MIDI data and record it. This APIs support Windows and macOS.
  • Finely adjust process of reading and writing. It allows, for example, to read corrupted files and repair them, or build MIDI file validators.
  • Implement custom meta events and custom chunks that can be written to and read from MIDI files.
  • Manage content of a MIDI file either with low-level objects, like event, or high-level ones, like note (read the High-level data managing section of the library docs).
  • Build musical compositions (see Pattern page of the library docs) and use music theory API (see Music Theory - Overview article).
  • Perform complex tasks like quantizing, notes splitting or converting MIDI file to CSV representation (see Tools page of the library docs).

Please see Getting started section below for quick jump into the library.

Projects using DryWetMIDI

Here the list of noticeable projects that use DryWetMIDI:

Getting Started

Let's see some examples of what you can do with DryWetMIDI.

To read a MIDI file you have to use Read static method of the MidiFile:

var midiFile = MidiFile.Read("Some Great Song.mid");

or, in more advanced form (visit Reading settings page on the library docs to learn more about how to adjust process of reading)

var midiFile = MidiFile.Read(
    "Some Great Song.mid",
    new ReadingSettings
        NoHeaderChunkPolicy = NoHeaderChunkPolicy.Abort,
        CustomChunkTypes = new ChunkTypesCollection
            { typeof(MyCustomChunk), "Cstm" }

To write MIDI data to a file you have to use Write method of the MidiFile:

midiFile.Write("My Great Song.mid");

or, in more advanced form (visit Writing settings page on the library docs to learn more about how to adjust process of writing)

    "My Great Song.mid",
    new WritingSettings
        UseRunningStatus = true,
        NoteOffAsSilentNoteOn = true

Of course you can create a MIDI file from scratch by creating an instance of the MidiFile and writing it:

var midiFile = new MidiFile(
    new TrackChunk(
        new SetTempoEvent(500000)),
    new TrackChunk(
        new TextEvent("It's just single note track..."),
        new NoteOnEvent((SevenBitNumber)60, (SevenBitNumber)45),
        new NoteOffEvent((SevenBitNumber)60, (SevenBitNumber)0)
            DeltaTime = 400

midiFile.Write("My Future Great Song.mid");


var midiFile = new MidiFile();
TempoMap tempoMap = midiFile.GetTempoMap();

var trackChunk = new TrackChunk();
using (var notesManager = trackChunk.ManageNotes())
    NotesCollection notes = notesManager.Notes;
    notes.Add(new Note(
            new MetricTimeSpan(hours: 0, minutes: 0, seconds: 10),

midiFile.Write("My Future Great Song.mid");

If you want to speed up playing back a MIDI file by two times you can do it with this code:

foreach (var trackChunk in midiFile.Chunks.OfType<TrackChunk>())
    foreach (var setTempoEvent in trackChunk.Events.OfType<SetTempoEvent>())
        setTempoEvent.MicrosecondsPerQuarterNote /= 2;

Of course this code is simplified. In practice a MIDI file may not contain SetTempo event which means it has the default one (500,000 microseconds per beat).

Instead of modifying a MIDI file you can use Playback class:

using (var outputDevice = OutputDevice.GetByName("Microsoft GS Wavetable Synth"))
using (var playback = midiFile.GetPlayback(outputDevice))
    playback.Speed = 2.0;

To get duration of a MIDI file as TimeSpan use this code:

TempoMap tempoMap = midiFile.GetTempoMap();
TimeSpan midiFileDuration = midiFile
    .LastOrDefault(e => e.Event is NoteOffEvent)
    ?.TimeAs<MetricTimeSpan>(tempoMap) ?? new MetricTimeSpan();

or simply:

TimeSpan midiFileDuration = midiFile.GetDuration<MetricTimeSpan>();

Suppose you want to remove all C# notes from a MIDI file. It can be done with this code:

foreach (var trackChunk in midiFile.GetTrackChunks())
    using (var notesManager = trackChunk.ManageNotes())
        notesManager.Notes.RemoveAll(n => n.NoteName == NoteName.CSharp);


midiFile.RemoveNotes(n => n.NoteName == NoteName.CSharp);

To get all chords of a MIDI file at 20 seconds from the start of the file write this:

TempoMap tempoMap = midiFile.GetTempoMap();
IEnumerable<Chord> chordsAt20seconds = midiFile
        new MetricTimeSpan(0, 0, 20),

To create a MIDI file with single note which length will be equal to length of two triplet eighth notes you can use this code:

var midiFile = new MidiFile();
var tempoMap = midiFile.GetTempoMap();

var trackChunk = new TrackChunk();
using (var notesManager = trackChunk.ManageNotes())
    var length = LengthConverter.ConvertFrom(
        2 * MusicalTimeSpan.Eighth.Triplet(),
    var note = new Note(NoteName.A, 4, length);

midiFile.Write("Single note great song.mid");

You can even build a musical composition:

Pattern pattern = new PatternBuilder()
    // Insert a pause of 5 seconds
    .StepForward(new MetricTimeSpan(0, 0, 5))

    // Insert an eighth C# note of the 4th octave
    .Note(Octave.Get(4).CSharp, MusicalTimeSpan.Eighth)

    // Set default note length to triplet eighth and default octave to 5

    // Now we can add triplet eighth notes of the 5th octave in a simple way

    // Get pattern

MidiFile midiFile = pattern.ToFile(TempoMap.Default);

DryWetMIDI provides devices API allowing to send MIDI events to and receive them from MIDI devices. Following example shows how to send events to MIDI device and handle them as they are received by the device:

using System;
using Melanchall.DryWetMidi.Multimedia;
using Melanchall.DryWetMidi.Core;

// ...

using (var outputDevice = OutputDevice.GetByName("MIDI Device"))
    outputDevice.EventSent += OnEventSent;

    using (var inputDevice = InputDevice.GetByName("MIDI Device"))
        inputDevice.EventReceived += OnEventReceived;

        outputDevice.SendEvent(new NoteOnEvent());
        outputDevice.SendEvent(new NoteOffEvent());

// ...

private void OnEventReceived(object sender, MidiEventReceivedEventArgs e)
    var midiDevice = (MidiDevice)sender;
    Console.WriteLine($"Event received from '{midiDevice.Name}' at {DateTime.Now}: {e.Event}");

private void OnEventSent(object sender, MidiEventSentEventArgs e)
    var midiDevice = (MidiDevice)sender;
    Console.WriteLine($"Event sent to '{midiDevice.Name}' at {DateTime.Now}: {e.Event}");
Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net45 net451 net452 net46 net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.5

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages (2)

Showing the top 2 NuGet packages that depend on Melanchall.DryWetMidi:

Package Downloads

Provides various document and media processing functions.


Send and receive events with a Behringer X-Touch Extender DAW MIDI control surface over USB.

GitHub repositories (6)

Showing the top 5 popular GitHub repositories that depend on Melanchall.DryWetMidi:

Repository Stars
Open singing synthesis platform / Open source UTAU successor
Keras.NET is a high-level neural networks API for C# and F#, with Python Binding and capable of running on top of TensorFlow, CNTK, or Theano.
.NET library to read, write, process MIDI files and to work with MIDI devices
Genshin Impact Windsong Lyre, Floral Zither, & Vintage Lyre MIDI auto player in Modern Mica UI. Supports MIDI instruments & Playlist controls.
Version Downloads Last updated
6.1.4 1,155 1/14/2023
6.1.3 1,436 10/23/2022
6.1.2 2,135 8/1/2022
6.1.1 708 6/8/2022
6.1.0 526 5/16/2022
6.0.1 2,431 12/21/2021
6.0.0 2,005 10/22/2021
5.2.1 3,257 6/20/2021
5.2.0 1,399 3/26/2021
5.1.2 12,045 11/21/2020
5.1.1 2,025 6/29/2020
5.1.0 1,820 3/13/2020
5.0.0 975 11/21/2019
4.1.1 913 7/31/2019
4.1.0 1,223 4/22/2019
4.0.0 875 1/30/2019
3.1.0 1,381 7/8/2018
3.0.0 1,255 6/15/2018
2.0.1 1,090 12/3/2017
2.0.0 1,050 11/6/2017
1.3.0 887 8/24/2017
1.2.0 867 8/1/2017
1.1.0 924 7/7/2017
1.0.0 1,284 5/25/2017