releasing radio button starts feeding silence into Whisper stream

Assets/_PROJECT/Scripts/ModeGeneration/FMODWhisperBridge.cs

@@ -179,6 +179,12 @@ public class FMODWhisperBridge : MonoBehaviour
 
         int rate = (_nativeRate > 0) ? _nativeRate : desiredSampleRate;
 
+        if (_stream != null)
+        {
+            try { _stream.StopStream(); } catch { }
+            _streamStarted = false;
+        }
+
         try
         {
             _stream = await whisper.CreateStream(rate, _nativeChannels);
@@ -247,16 +253,6 @@ public class FMODWhisperBridge : MonoBehaviour
         // Pause loopback if it should only be active during recording
         if (playLoopback && loopbackOnlyWhenActive && _playChannel.hasHandle())
             _playChannel.setPaused(true);
-
-        // Tear down Whisper stream
-        if (_streamStarted)
-        {
-            try { _stream.StopStream(); } catch { /* ignore */ }
-            _streamStarted = false;
-        }
-        _stream = null;
-
-        Debug.Log("[FMOD→Whisper] Stream deactivated (Whisper stopped; FMOD still recording).");
     }
 
     /// <summary>
@@ -303,10 +299,6 @@ public class FMODWhisperBridge : MonoBehaviour
             return;
         }
 
-        // If not active, we *still* advance the ring (so we don't backlog data),
-        // but we *don't* push chunks to Whisper.
-        bool shouldFeed = isRecordingActivated && _streamStarted && _stream != null;
-
         // Calculate byte range to lock (16-bit)
         uint bytesToRead = deltaSamples * (uint)_nativeChannels * 2; // 2 bytes per sample
         uint startBytes = _lastRecordPos * (uint)_nativeChannels * 2;
@@ -323,7 +315,6 @@ public class FMODWhisperBridge : MonoBehaviour
 
         try
         {
-
             float rmsAccumulator = 0f;
             int rmsSampleCount = 0;
 
@@ -345,13 +336,24 @@ public class FMODWhisperBridge : MonoBehaviour
                 currentVolumeRms = Mathf.Lerp(currentVolumeRms, rms, 1f - Mathf.Pow(1f - volumeSmoothing, Time.deltaTime * 60f));
             }
 
-            // 2) Feed audio to Whisper ONLY when active
-            if (shouldFeed && !_skipOneFeedFrame)
+            // 2) Feed audio to Whisper
+            if (_streamStarted && _stream != null)
             {
-                if (len1 > 0) CopyPcm16ToFloatAndFeed(p1, len1);
-                if (len2 > 0) CopyPcm16ToFloatAndFeed(p2, len2);
+                if (isRecordingActivated && !_skipOneFeedFrame)
+                {
+                    // Feed real mic
+                    if (len1 > 0) CopyPcm16ToFloatAndFeed(p1, len1);
+                    if (len2 > 0) CopyPcm16ToFloatAndFeed(p2, len2);
+                }
+                else
+                {
+                    // Feed same-size silence instead
+                    if (len1 > 0) FeedSilentChunk(len1);
+                    if (len2 > 0) FeedSilentChunk(len2);
+                }
             }
 
+
             // If skipping, we just discard this frame to ensure no stale data leaks.
         }
         finally
@@ -370,6 +372,25 @@ public class FMODWhisperBridge : MonoBehaviour
         return input.Replace("[silence]", "").Replace("[ Silence ]", "").Replace("BLANK_AUDIO", "").Replace("[", "").Replace("]", "").Trim();
     }
 
+    private void FeedSilentChunk(uint byteLen)
+    {
+        int samples = (int)(byteLen / 2);
+        EnsureTmpCapacity(samples);
+
+        // fill existing _floatTmp with zeros (efficient)
+        Array.Clear(_floatTmp, 0, samples);
+
+        var chunk = new AudioChunk
+        {
+            Data = _floatTmp.AsSpan(0, samples).ToArray(),
+            Frequency = (_nativeRate > 0) ? _nativeRate : desiredSampleRate,
+            Channels = _nativeChannels,
+            IsVoiceDetected = false
+        };
+
+        _stream.AddToStream(chunk);
+    }
+
     private void CopyPcm16ToFloatAndFeed(IntPtr src, uint byteLen)
     {
         int samples = (int)(byteLen / 2); // 2 bytes per sample

Assets/_PROJECT/Scripts/ModeGeneration/ShapeDetection/RadioTransmitter.cs

@@ -76,13 +76,13 @@ public class RadioTransmitter : XRGrabInteractable
 
     private void OnRadioButtonReleased()
     {
+        fmodWhisperBridge.DeactivateRecording();
         AudioManager.Instance.PlayAttachedInstance(FMODEvents.Instance.RadioButton, gameObject);
     }
 
     private void OnPlayerSpeechUpdated(string text)
     {
         computerScreen.text = text;
-        //OnPlayerFinishedSpeaking?.Invoke();
     }
 
     private void OnPlayerSpeechFinished(string playerText)
@@ -93,8 +93,7 @@ public class RadioTransmitter : XRGrabInteractable
 
         fmodWhisperBridge.OnWhisperSegmentUpdated -= OnPlayerSpeechUpdated;
         fmodWhisperBridge.OnWhisperSegmentFinished -= OnPlayerSpeechFinished;
-        fmodWhisperBridge.DeactivateRecording();
-
+        
         particleEmission.enabled = false;
     }
 }