EZSynth

C# synthesizer designed to be extensible and generic in terms of formats of audio and sequence data.

Installation

Install via NuGet:

Install-Package EZSynth -Version x.x.x
Install-Package EZSynth.Implementations -Version x.x.x

Or via the .NET CLI:

dotnet add package EZSynth --version x.x.x
dotnet add package EZSynth.Implementations --version x.x.x

Usage

EZSynth was designed with a 'bring your own data' approach, though comes with basic default implementations.

Implement ISequence to provide your own sequence data (in a format similar to MIDI events) for the synthesizer.

Implement ISoundbank to provide an interface for the synth to get sample/note data based on preset, note, and velocity.

Implement ISampler to provide an interface for getting sample data.

Built in to EZSynth are samplers PCMSampler and SineSampler for sampling PCM and sine data. There is also SineBank that is an ISoundbank interface providing SineSampler instances to play notes.

There is also EZSynth.Implementations which contains MidiSequence and SoundfontSoundbank, to render MIDI data from MIDI files with samples from SoundFont 2 files. This is in a separate package because it brings in a couple of extra dependencies (DryWetMidi and EZSF2).

// open soundfont with EZSF2 and create a soundbank
using BinaryReader br = new BinaryReader(File.OpenRead("test.sf2"));
SF2 soundFont = new SF2(br);
var soundbank = new SoundfontSoundbank(soundFont);

// create synth with the soundbank
int sampleRate = 44100;
var synth = new Synth(soundbank, sampleRate);

// open midi file with DryWetMidi and create a sequence
using var fs = File.OpenRead("midi.mid");
MidiFile midiFile = MidiFile.Read(fs);
MidiSequence sequence = new MidiSequence(midiFile);

// create sequencer with the sequence
Sequencer sequencer = new Sequencer(sequence, synth);

// render the sequence into PCM data as short[]
var sampleData = sequencer.Render();

// write the data to a WAV file with NAudio
using var writer = new WaveFileWriter("out.wav", new WaveFormat(sampleRate, 2));
writer.WriteSamples(sampleData, 0, sampleData.Length);