fix the id we send for sequencer events

libs/mixer/sim/music.ts

@@ -54,16 +54,16 @@
 
         await res.sequencer.initAsync();
         res.sequencer.addEventListener("stop", () => {
-            board().bus.queue(SEQUENCER_STOP_MESSAGE, this.id);
+            board().bus.queue(SEQUENCER_STOP_MESSAGE, res.id);
         });
         res.sequencer.addEventListener("state-change", () => {
-            board().bus.queue(SEQUENCER_STATE_CHANGE_MESSAGE, this.id);
+            board().bus.queue(SEQUENCER_STATE_CHANGE_MESSAGE, res.id);
         });
         res.sequencer.addEventListener("looped", () => {
-            board().bus.queue(SEQUENCER_LOOPED_MESSAGE, this.id);
+            board().bus.queue(SEQUENCER_LOOPED_MESSAGE, res.id);
         });
         res.sequencer.addEventListener("tick", () => {
-            board().bus.queue(SEQUENCER_TICK_MESSAGE, this.id);
+            board().bus.queue(SEQUENCER_TICK_MESSAGE, res.id);
         });
 
 
@@ -71,24 +71,24 @@
     }
 
     export function _sequencerState(id: number): string {
         return lookupSequencer(id)?.state();
     }
 
     export function _sequencerCurrentTick(id: number): number {
         return lookupSequencer(id)?.currentTick();
     }
 
     export function _sequencerPlaySong(id: number, song: RefBuffer, loop: boolean): void {
         const decoded = decodeSong(song.data);
         lookupSequencer(id)?.start(decoded, loop);
     }
 
     export function _sequencerStop(id: number): void {
         lookupSequencer(id)?.stop();
     }
 
     export function _sequencerSetVolume(id: number, volume: number): void {
         lookupSequencer(id)?.setVolume(volume);
     }
 
     export function _sequencerSetVolumeForAll(volume: number): void {