strudel-docker/website/src/repl/prebake.mjs

import { Pattern, noteToMidi, valueToMidi } from '@strudel/core';
import { registerSynthSounds, registerZZFXSounds, samples } from '@strudel/webaudio';
import { registerSamplesFromDB } from './idbutils.mjs';
import './piano.mjs';
import './files.mjs';

const { BASE_URL } = import.meta.env;
const baseNoTrailing = BASE_URL.endsWith('/') ? BASE_URL.slice(0, -1) : BASE_URL;

export async function prebake() {
  // https://archive.org/details/SalamanderGrandPianoV3
  // License: CC-by http://creativecommons.org/licenses/by/3.0/ Author: Alexander Holm
  await Promise.all([
    registerSynthSounds(),
    registerZZFXSounds(),
    registerSamplesFromDB(),
    //registerSoundfonts(),
    // need dynamic import here, because importing @strudel/soundfonts fails on server:
    // => getting "window is not defined", as soon as "@strudel/soundfonts" is imported statically
    // seems to be a problem with soundfont2
    import('@strudel/soundfonts').then(({ registerSoundfonts }) => registerSoundfonts()),
    samples(`${baseNoTrailing}/piano.json`, `${baseNoTrailing}/piano/`, { prebake: true }),
    // https://github.com/sgossner/VCSL/
    // https://api.github.com/repositories/126427031/contents/
    // LICENSE: CC0 general-purpose
    samples(`${baseNoTrailing}/vcsl.json`, 'github:sgossner/VCSL/master/', { prebake: true }),
    samples(`${baseNoTrailing}/tidal-drum-machines.json`, 'github:ritchse/tidal-drum-machines/main/machines/', {
      prebake: true,
      tag: 'drum-machines',
    }),
    samples(`${baseNoTrailing}/EmuSP12.json`, `${baseNoTrailing}/EmuSP12/`, { prebake: true, tag: 'drum-machines' }),
    samples(
      {
        casio: ['casio/high.wav', 'casio/low.wav', 'casio/noise.wav'],
        crow: ['crow/000_crow.wav', 'crow/001_crow2.wav', 'crow/002_crow3.wav', 'crow/003_crow4.wav'],
        insect: [
          'insect/000_everglades_conehead.wav',
          'insect/001_robust_shieldback.wav',
          'insect/002_seashore_meadow_katydid.wav',
        ],
        wind: [
          'wind/000_wind1.wav',
          'wind/001_wind10.wav',
          'wind/002_wind2.wav',
          'wind/003_wind3.wav',
          'wind/004_wind4.wav',
          'wind/005_wind5.wav',
          'wind/006_wind6.wav',
          'wind/007_wind7.wav',
          'wind/008_wind8.wav',
          'wind/009_wind9.wav',
        ],
        jazz: [
          'jazz/000_BD.wav',
          'jazz/001_CB.wav',
          'jazz/002_FX.wav',
          'jazz/003_HH.wav',
          'jazz/004_OH.wav',
          'jazz/005_P1.wav',
          'jazz/006_P2.wav',
          'jazz/007_SN.wav',
        ],
        metal: [
          'metal/000_0.wav',
          'metal/001_1.wav',
          'metal/002_2.wav',
          'metal/003_3.wav',
          'metal/004_4.wav',
          'metal/005_5.wav',
          'metal/006_6.wav',
          'metal/007_7.wav',
          'metal/008_8.wav',
          'metal/009_9.wav',
        ],
        east: [
          'east/000_nipon_wood_block.wav',
          'east/001_ohkawa_mute.wav',
          'east/002_ohkawa_open.wav',
          'east/003_shime_hi.wav',
          'east/004_shime_hi_2.wav',
          'east/005_shime_mute.wav',
          'east/006_taiko_1.wav',
          'east/007_taiko_2.wav',
          'east/008_taiko_3.wav',
        ],
        space: [
          'space/000_0.wav',
          'space/001_1.wav',
          'space/002_11.wav',
          'space/003_12.wav',
          'space/004_13.wav',
          'space/005_14.wav',
          'space/006_15.wav',
          'space/007_16.wav',
          'space/008_17.wav',
          'space/009_18.wav',
          'space/010_2.wav',
          'space/011_3.wav',
          'space/012_4.wav',
          'space/013_5.wav',
          'space/014_6.wav',
          'space/015_7.wav',
          'space/016_8.wav',
          'space/017_9.wav',
        ],
        numbers: [
          'numbers/0.wav',
          'numbers/1.wav',
          'numbers/2.wav',
          'numbers/3.wav',
          'numbers/4.wav',
          'numbers/5.wav',
          'numbers/6.wav',
          'numbers/7.wav',
          'numbers/8.wav',
        ],
      },
      'github:tidalcycles/dirt-samples',
      {
        prebake: true,
      },
    ),
  ]);
}

const maxPan = noteToMidi('C8');
const panwidth = (pan, width) => pan * width + (1 - width) / 2;

Pattern.prototype.piano = function () {
  return this.fmap((v) => ({ ...v, clip: v.clip ?? 1 })) // set clip if not already set..
    .s('piano')
    .release(0.1)
    .fmap((value) => {
      const midi = valueToMidi(value);
      // pan by pitch
      const pan = panwidth(Math.min(Math.round(midi) / maxPan, 1), 0.5);
      return { ...value, pan: (value.pan || 1) * pan };
    });
};