add pico-os.uf2, upload

upload.js

@@ -138,7 +138,7 @@ const instrumentKey = {
 const reverseInstrumentKey = Object.fromEntries(Object.entries(instrumentKey).map(([k, v]) => [v, k]));
 
 function textToTune(text) {
- const elements = text.replace(/\\s/g, '').split(',');
+ const elements = text.replace(/\s/g, '').split(',');
  const tune = [];
 
  for (const element of elements) {
@@ -147,7 +147,7 @@ function textToTune(text) {
  const duration = Math.round(parseInt(durationRaw));
  const notes = (notesRaw || '').split('+').map((noteRaw) => {
  if (!noteRaw) return [];
- const [, pitchRaw, instrumentRaw, durationRaw] = noteRaw.match(/^(.+)([~\\-^\\/])(.+)$/);
+ const [, pitchRaw, instrumentRaw, durationRaw] = noteRaw.match(/^(.+)([~\-^\/])(.+)$/);
  return [
  instrumentKey[instrumentRaw],
  isNaN(parseInt(pitchRaw, 10)) ? pitchRaw : parseInt(pitchRaw, 10),
@@ -164,13 +164,6 @@ const sleep = async (duration) => new Promise(_ => setTimeout(_, duration))
 
 const INSTRUMENTS = ["sine", "triangle", "square", "sawtooth"];
 
-function playFrequency(channel, frequency, duration) {
- const { setvolume, setfreq } = require("i2saudio");
- setvolume(channel, 1500);
- setfreq(channel, frequency);
- setTimeout(() => setvolume(channel, 0), duration);
-}
-
 const audio = require("i2saudio");
 function playTuneHelper(tune, number, playingRef) {
  for (let i = 0; i < tune.length*number; i++) {
@@ -188,8 +181,9 @@ function playTuneHelper(tune, number, playingRef) {
  ? tones[note.toUpperCase()]
  : 2**((note-69)/12)*440;
 
- if (INSTRUMENTS.includes(instrument) && f !== undefined)
- audio.push_freq(f);
+ const i = INSTRUMENTS.indexOf(instrument);
+ if ((i >= 0) && f !== undefined)
+ audio.push_freq(f, i);
  }
  audio.wait(sleepTime);
  }