add AudioLink BPM Detector

2026-04-19 23:13:47 +02:00 · 2026-04-11 10:44:03 +02:00
parent 185f1cc96a
commit 689ceca124
2 changed files with 107 additions and 0 deletions
--- a/AudioLink/AudioLinkBeatDetector.cs
+++ b/AudioLink/AudioLinkBeatDetector.cs
@@ -0,0 +1,64 @@
+using UdonSharp;
+using UnityEngine;
+using AudioLink;
+
+public class AudioLinkBeatDetector : UdonSharpBehaviour
+{
+    public AudioLink.AudioLink audioLinkInstance;
+    
+    [Header("Settings")]
+    [Range(0, 1)] public float threshold = 0.5f;
+    public float minBpm = 70f;
+    public float maxBpm = 210f; // Alles darüber wird als Fehler ignoriert
+    
+    [Header("Output")]
+    public float bpm = 128f;
+    public float instantBpm = 128f;
+    public bool isBeat;
+    
+    private float lastBeatTime;
+
+    void Update()
+    {
+        if (audioLinkInstance == null || !audioLinkInstance.AudioDataIsAvailable()) return;
+
+        Vector2 bassPos = AudioLink.AudioLink.GetALPassAudioBass();
+        Vector4 data = audioLinkInstance.GetDataAtPixel((int)bassPos.x, (int)bassPos.y);
+        float currentLevel = data.x;
+
+        // Prüfen auf Threshold
+        if (currentLevel > threshold)
+        {
+            float currentTime = Time.time;
+            float timeDiff = currentTime - lastBeatTime;
+
+            // Der "Debounce" Check: 
+            // 0.27s entspricht ca. 222 BPM. Alles was schneller kommt, ist Rauschen.
+            if (timeDiff > 0.27f) 
+            {
+                if (lastBeatTime > 0)
+                {
+                    float detected = 60f / timeDiff;
+                    
+                    // Nur plausible Werte übernehmen
+                    if (detected >= minBpm && detected <= maxBpm)
+                    {
+                        instantBpm = detected;
+                        // Glättung: 0.5 sorgt für schnelles Folgen, aber filtert Ausreißer
+                        bpm = Mathf.Lerp(bpm, instantBpm, 0.5f);
+                    }
+                }
+                lastBeatTime = currentTime;
+                isBeat = true;
+            }
+            else
+            {
+                isBeat = false;
+            }
+        }
+        else
+        {
+            isBeat = false;
+        }
+    }
+}