midifunk

Kotlin Multiplatform MIDI library that just makes sense.
Currently focused on live MIDI I/O.

Note: this is still in an experimental stage, expect breaking changes until the first stable release.

Features

• Type-safe MIDI events with the events module
• MIDI as consumable channels with Coroutines
• Minimal code required for listening
• Easy input & output

Platforms

Platform	Events	Devices	Comment
JVM	✅️	✅️
Windows	✅️	✖️	Waiting on Windows MIDI services
Linux	✅️	✖️	Devices support coming after Windows
MacOS	❔️	✖️	No device for testing or development available.

Usage

Version catalog

[versions]
midifunk = "[version]"

[libraries]
midifunk-events = { module = "dev.stashy.midifunk:events", version.ref = "midifunk" }
midifunk-devices = { module = "dev.stashy.midifunk:devices", version.ref = "midifunk" }

Gradle Kotlin

implementation("dev.stashy.midifunk", "events", "version")
implementation("dev.stashy.midifunk", "devices", "version")

Examples

Opening device for reading inputs

val device = MidiDevice.list()[0]
device.input.open(coroutineScope).onEach { println(it) }

Opening output channel

val device = MidiDevice.list()[0]
val channel: SendChannel<MidiData> = device.output.open(coroutineScope)
channel.send(event)

Creating type-safe MIDI events with DSL

NoteEvent.create {
    noteStatus = true
    note = Note.C(4)
    velocity = 127u
}

Roadmap

Top priority at the moment is to finalize the device input/output API. The eventual goal is to be able to completely rip out the Java MIDI backend & use something else, which will also provide multiplatform support.

After the device API, virtual device support is going to be prioritized. This will most likely require separate backends for each platform to be implemented already.

Contributing

Although not strictly, please try to adhere to the standard Kotlin code style guidelines, more thoroughly defined in JetBrains IDEs. Other than that, feel free to submit pull requests - I will gladly review them.