Recording Audio from USB with PyAudio

问题

I am trying to record a 5 second clip of audio using a microphone that's connected via usb but I can't seem to get it to work. I am able to record using that mic with QuickTime but not with python. When the script runs, it generates the wave file but the file doesn't have any sound.

This is the code I'm using to record the audio. I have set the input_device_index=4 which is the input device id for my MADIface XT mic.

import pyaudio
import wave

CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output.wav"

p = pyaudio.PyAudio()

stream = p.open(format=FORMAT,
                channels=CHANNELS,
                rate=RATE,
                input=True,
                frames_per_buffer=CHUNK,
                input_device_index=4)

print("* recording")

frames = []

for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)):
    data = stream.read(CHUNK)
    frames.append(data)

print("* done recording")

stream.stop_stream()
stream.close()
p.terminate()

wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(b''.join(frames))
wf.close()

After some more research I have found that it may be a permissions issue with the microphone on PyCharm. I have tried running the script through Terminal where it did ask for permission to use the microphone when I initially ran it but I still have an empty WAV file. I tried also just using the built in microphone but same problems persist.

any help is much appreciated.

来源：https://stackoverflow.com/questions/59774166/recording-audio-from-usb-with-pyaudio

标签

python

macos

audio-recording