I have pyaudio starting a recording when a GPIO button is pressed then stops the recording when the GPIO button is pressed again, any reason why it's appending the audio to the file. I want a new file with the new audio, it can overwrite output.wav.

So for example If i press the button say 1234, press the button it creates output.wav, if I press the button again and say 567, press the button again to stop it does not overwrite output.wav with 567 it appends it to the 1234 first recording, so then I get output.wav with the audio 1234 then 567 in it.

def record_audio():
    draw.rectangle((0,0,disp.width,disp.height), outline=0, fill=0)
    disp.LCD_ShowImage(image,0,0)
    

    global frames, recording, enroll, WAVE_OUTPUT_FILENAME
    recording = True
    # Initialize PyAudio
    audio = pyaudio.PyAudio()

    # Open stream
    stream = audio.open(format=FORMAT,
                        input_device_index=10,
                        channels=CHANNELS,
                        rate=RATE,
                        input=True,
                        frames_per_buffer=CHUNK)

    print("Recording... Press Enter to stop.")
  

    # Record loop

    while recording:
        data = stream.read(CHUNK, exception_on_overflow = False)
        frames.append(data)
        
        if disp.digital_read(disp.GPIO_KEY_PRESS_PIN ) == 1:
            print("recording stopping")
            recording = False
            time.sleep(1)
           
    
    print("Recording stopped.")
    
    # Stop and close stream
    stream.stop_stream()
    stream.close()
    audio.terminate()

    # Save to file
    with wave.open(WAVE_OUTPUT_FILENAME, 'wb') as wf:
        wf.setnchannels(CHANNELS)
        wf.setsampwidth(audio.get_sample_size(FORMAT))
        wf.setframerate(RATE)
        wf.writeframes(b''.join(frames))



    print(f"Saved recording as {WAVE_OUTPUT_FILENAME}")
    # Wait for Enter key
    time.sleep(.5)
    enroll = 4
    main()

# Thread to handle recording
recording_thread = threading.Thread(target=record_audio)
recording_thread.start()



input()  # Press Enter to stop
recording = False
recording_thread.join()