slightly better

public/worklets/bytebeat-processor.js

@@ -12,6 +12,7 @@ class BytebeatProcessor extends AudioWorkletProcessor {
     this.sampleRate = 8000
     this.duration = 4
     this.loopLength = this.sampleRate * this.duration
+    this.playbackRate = 1.0
     this.error = false
 
     this.port.onmessage = (event) => {
@@ -32,6 +33,9 @@ class BytebeatProcessor extends AudioWorkletProcessor {
         case 'loopLength':
           this.loopLength = value
           break
+        case 'playbackRate':
+          this.playbackRate = value
+          break
       }
     }
   }
@@ -71,7 +75,7 @@ class BytebeatProcessor extends AudioWorkletProcessor {
           }
         }
 
-        this.t++
+        this.t += this.playbackRate
         if (this.loopLength > 0 && this.t >= this.loopLength) {
           this.t = 0
         }