Improve stt response time

frontend/src/hooks/useSTT.ts

@@ -166,6 +166,8 @@ export function useSTT(userId = 'default') {
       audioRecorder.current = new AudioRecorder()
     }
 
+    audioRecorder.current.warmup()
+
     setupAudioRecorder(audioRecorder.current)
 
     return () => {

frontend/src/lib/audioRecorder.ts

@@ -53,6 +53,26 @@ export class AudioRecorder {
     )
   }
 
+  async warmup(): Promise<boolean> {
+    if (!AudioRecorder.isSupported()) {
+      return false
+    }
+
+    try {
+      const stream = await navigator.mediaDevices.getUserMedia({
+        audio: {
+          echoCancellation: true,
+          noiseSuppression: true,
+          autoGainControl: true,
+        },
+      })
+      stream.getTracks().forEach(track => track.stop())
+      return true
+    } catch {
+      return false
+    }
+  }
+
   getState(): AudioRecorderState {
     return this.state
   }
@@ -186,3 +206,8 @@ export function getAudioRecorder(): AudioRecorder {
 export function isAudioRecordingSupported(): boolean {
   return AudioRecorder.isSupported()
 }
+
+export async function warmupAudioRecorder(): Promise<boolean> {
+  const recorder = getAudioRecorder()
+  return recorder.warmup()
+}