Add kick sequencer

1 files changed, 29 insertions, 0 deletions

diff --git a/src/sounds.ts b/src/sounds.ts
new file mode 100644
index 0000000..9ce8d2e
--- /dev/null
+++ b/src/sounds.ts
@@ -0,0 +1,29 @@
+export interface Sounds {
+  kick: AudioBuffer
+}
+
+const audioContext = new AudioContext()
+let lazy: undefined | Sounds = undefined
+
+export async function load(): Promise<Sounds> {
+  if (lazy !== undefined) {
+    return lazy
+  } else {
+
+    const kick = await fetch('/sounds/kick.opus')
+      .then(res => res.arrayBuffer())
+      .then(ArrayBuffer => audioContext.decodeAudioData(ArrayBuffer))
+
+    lazy = {
+      kick
+    }
+    return lazy
+  }
+}
+
+export function playKick(sounds: Sounds) {
+  const source = audioContext.createBufferSource()
+  source.buffer = sounds.kick
+  source.connect(audioContext.destination)
+  source.start()
+}