midk

export enum PitchNotation { Scientific = 'Scientific', Helmholtz = 'Helmholtz', } // https://www.midi.org/specifications/item/table-1-summary-of-midi-message export enum MessageStatus { noteOffEvent = 0b1000 << 4, noteOnEvent = 0b1001 << 4, polyphonicPressure = 0b1010 << 4, controlChange = 0b1011 << 4, programChange = 0b1100 << 4, channelPressure = 0b1101 << 4, pitchBendChange = 0b1110 << 4, } export type MessageData = number export type Message = [ MessageStatus, MessageData, MessageData, ] // Scientific pitch notation // https://en.wikipedia.org/wiki/Scientific_pitch_notation // 88 keys: [A0 ... C8] // 61 keys: [C2 ... C7] export enum NoteCode { C0 = 12, CSharp0, D0, DSharp0, E0, F0, FSharp0, G0, GSharp0, A0, ASharp0, B0, C1, CSharp1, D1, DSharp1, E1, F1, FSharp1, G1, GSharp1, A1, ASharp1, B1, C2, CSharp2, D2, DSharp2, E2, F2, FSharp2, G2, GSharp2, A2, ASharp2, B2, C3, CSharp3, D3, DSharp3, E3, F3, FSharp3, G3, GSharp3, A3, ASharp3, B3, C4, CSharp4, D4, DSharp4, E4, F4, FSharp4, G4, GSharp4, A4, ASharp4, B4, C5, CSharp5, D5, DSharp5, E5, F5, FSharp5, G5, GSharp5, A5, ASharp5, B5, C6, CSharp6, D6, DSharp6, E6, F6, FSharp6, G6, GSharp6, A6, ASharp6, B6, C7, CSharp7, D7, DSharp7, E7, F7, FSharp7, G7, GSharp7, A7, ASharp7, B7, C8, CSharp8, D8, DSharp8, E8, F8, FSharp8, G8, GSharp8, A8, ASharp8, B8, C9, } export type NoteNameKey = keyof typeof NoteCode export type NoteVelocity = number export type NoteEvent = Extract< MessageStatus, typeof MessageStatus.noteOnEvent | typeof MessageStatus.noteOffEvent > export type NoteMessage = [ NoteEvent, NoteCode, NoteVelocity, ] export type Timestamp = number