added MidiAudio.awaitWarmup

web/score-player.js

@@ -162,6 +162,10 @@
 		try {
 			await state.audio.MidiAudio.loadPlugin({ soundfontUrl: SOUNDFONT_URL, api: 'webaudio' });
 			state.audioReady = true;
+			// warm up the AudioContext eagerly so later plays are already hot (the
+			// in-gesture warmup in play() is what actually satisfies autoplay policy)
+			var WA = state.audio.MidiAudio.WebAudio;
+			if (WA && WA.awaitWarmup) { try { await WA.awaitWarmup(); } catch (e) {} }
 			log('audio ready');
 			return true;
 		} catch (e) {
@@ -203,8 +207,12 @@
 		return lo;
 	}
 
-	function play () {
+	async function play () {
 		if (!state.player || !state.midiData || state.isPlaying || state.generating) return;
+		// warm up the AudioContext (browser autoplay policy) inside the play gesture
+		// before scheduling notes, so the opening notes aren't dropped on first play
+		var WA = state.audio && state.audio.MidiAudio && state.audio.MidiAudio.WebAudio;
+		if (WA && WA.awaitWarmup) { try { await WA.awaitWarmup(); } catch (e) {} }
 		state.isPlaying = true;
 		if (state.pausedTime > 0) {
 			state.playStartTime = performance.now() - state.pausedTime;

web/vendor/musicWidgetsBrowser.umd.min.js

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ddc96a5ab24a6751bb6f345255fa78bb650d01ba503261ce88d1cb3d125ccbff
-size 62239
+oid sha256:dd9c61afba82517fca99babe04ff56f325de55303815d3bc466f26d5125eaee3
+size 44695