@hlysine/piano/src/piano/Salamander.ts

Web Audio instrument using Salamander Grand Piano samples

import { midiToNote } from './Util'

export const githubURL = 'https://tambien.github.io/Piano/Salamander/'

export function getReleasesUrl(midi: number): string {
	return `rel${midi - 20}.[mp3|ogg]`
}

export function getHarmonicsUrl(midi: number): string {
	return `harmS${midiToNote(midi).replace('#', 's')}.[mp3|ogg]`
}

export function getNotesUrl(midi: number, vel: any): string {
	return `${midiToNote(midi).replace('#', 's')}v${vel}.[mp3|ogg]`
}

/**
 * Maps velocity depths to Salamander velocities
 */
export const velocitiesMap: { [s: number]: number[] } = {
	1: [8],
	2: [6, 12],
	3: [1, 7, 15],
	4: [1, 5, 10, 15],
	5: [1, 4, 8, 12, 16],
	6: [1, 3, 7, 10, 13, 16],
	7: [1, 3, 6, 9, 11, 13, 16],
	8: [1, 3, 5, 7, 9, 11, 13, 16],
	9: [1, 3, 5, 7, 9, 11, 13, 15, 16],
	10: [1, 2, 3, 5, 7, 9, 11, 13, 15, 16],
	11: [1, 2, 3, 5, 7, 9, 11, 13, 14, 15, 16],
	12: [1, 2, 3, 4, 5, 7, 9, 11, 13, 14, 15, 16],
	13: [1, 2, 3, 4, 5, 7, 9, 11, 12, 13, 14, 15, 16],
	14: [1, 2, 3, 4, 5, 6, 7, 9, 11, 12, 13, 14, 15, 16],
	15: [1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16],
	16: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16],
}

/**
 * All the notes of audio samples
 */
export const allNotes: number[] = [
	21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54,
	57, 60, 63, 66, 69, 72, 75, 78, 81, 84,
	87, 90, 93, 96, 99, 102, 105, 108]

export function getNotesInRange(min: number, max: number): number[] {
	return allNotes.filter(note => min <= note && note <= max)
}

/**
 * All the notes of audio samples
 */
const harmonics: number[] = [21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87]

export function getHarmonicsInRange(min: number, max: number): number[] {
	return harmonics.filter(note => min <= note && note <= max)
}

export function inHarmonicsRange(note: number): boolean {
	return harmonics[0] <= note && note <= harmonics[harmonics.length - 1]
}