add audio analyser fft data

src/background.ts

@@ -19,7 +19,7 @@ import { SpeechRecorder } from "speech-recorder";
 // });
 //
 
-const recorder = new SpeechRecorder();
+const recorder = new SpeechRecorder({ sampleRate: 16000, framesPerBuffer: 320 });
 
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
@@ -59,7 +59,7 @@ function createWindow() {
       recorder.start({
         onAudio: (audio: object, speech: boolean) => {
           if (win) {
-            win.webContents.send('render-audio', { data: audio })
+            win.webContents.send('render-audio', audio)
           }
           if (speech) {
             // TODO: send audio to crimata BE