Randomly choose sound effect

Also some JS cleanup

1 files changed, 22 insertions, 0 deletions

diff --git a/static/main.js b/static/main.js
new file mode 100644
index 0000000..144254f
--- /dev/null
+++ b/static/main.js
@@ -0,0 +1,22 @@
+let _context;
+function getContext() {
+  if (!_context) {
+    _context = new AudioContext();
+  }
+  return _context;
+}
+
+function loadSample(url) {
+  return fetch(url)
+    .then((response) => response.arrayBuffer())
+    .then((buffer) => getContext().decodeAudioData(buffer));
+}
+
+function playSoundSample(sample, sampleNote, noteToPlay) {
+  const ctx = getContext();
+  const source = ctx.createBufferSource();
+  source.buffer = sample;
+  source.playbackRate.value = 2 ** ((noteToPlay - sampleNote) / 12);
+  source.connect(ctx.destination);
+  source.start(0);
+}