Class MidiOut

constructor

• new MidiOut(
      output: Output | null,
      channels: Set<number>,
      log?: (msg: string) => void,
  ): MidiOut

  Construct a new wrapper for a webmidi.js output.

  Parameters

  • output: Output | null

    Output device or null if you need a dummy out.

  • channels: Set<number>

    Channels to use for sending pitch bent MIDI notes. Number of channels determines maximum microtonal polyphony.

  • Optionallog: (msg: string) => void

    Logging function.

  Returns MidiOut

channels

log

output

clear

• clear(): void

  Clear scheduled notes that have not yet been played. Will start working once the Chrome bug is fixed: https://bugs.chromium.org/p/chromium/issues/detail?id=471798

  Returns void

playNotes

• playNotes(notes: Note[]): void

  Schedule a series of notes to be played at a later time. Notes are converted to note-on/off events, sorted by timestamp, and then emitted in causal order. Please note that this reserves the channels until all notes have finished playing.

  Parameters

  • notes: Note[]

    Notes to be played.

  Returns void

sendNoteOn

• sendNoteOn(
      frequency: number,
      rawAttack?: number,
      time?: number,
  ): (rawRelease?: number, time?: number) => void

  Send a note-on event and pitch-bend to the output device on one of the available channels.

  Parameters

  • frequency: number

    Frequency of the note in Hertz (Hz).

  • OptionalrawAttack: number

    Attack velocity of the note from 0 to 127.

  • Optionaltime: number

  Returns (rawRelease?: number, time?: number) => void

  A callback for sending a corresponding note off on the correct channel.