Change clock starting point and add oncount method as alternative to onbeat

src/Clock.ts

@@ -40,9 +40,9 @@ export class Clock {
   tick: number;
 
   constructor(public app: Editor, ctx: AudioContext) {
-    this.time_position = { bar: 0, beat: 0, pulse: 0 };
+    this.time_position = { bar: -1, beat: -1, pulse: -1 };
     this.time_signature = [4, 4];
-    this.tick = 0;
+    this.tick = -1;
     this._bpm = 120;
     this._ppqn = 48;
     this.transportNode = null;
@@ -157,7 +157,7 @@ export class Clock {
     /**
      * Stops the TransportNode (stops the clock).
      */
-    this.app.clock.tick = 0;
+    this.app.clock.tick = -1;
     this.transportNode?.stop();
   }
 }