record.py

import pyaudio
import wave
import time

form_1 = pyaudio.paInt16 # 16-bit resolution
chans = 1 # 1 channel
samp_rate = 44100 # 44.1kHz sampling rate
chunk = 4096 # 2^12 samples for buffer
record_secs = 3 # seconds to record
dev_index = 1 # device index found by p.get_device_info_by_index(ii)

audio = pyaudio.PyAudio() # create pyaudio instantiation

while True:
    # create pyaudio stream
    stream = audio.open(
        format=pyaudio.paInt16,
        channels=1,
        rate=48000,
        input_device_index=dev_index,
        input=True)

    print("recording")
    frames = []

    # loop through stream and append audio chunks to frame array
    for ii in range(0,int((samp_rate/chunk)*record_secs)):
        data = stream.read(chunk)
        frames.append(data)

    print("finished recording")

    # stop the stream, close it, and terminate the pyaudio instantiation
    stream.stop_stream()
    stream.close()
    audio.terminate()
    wav_output_filename = "recording" + str(int(round(time.time()*1000))) + ".wav"
    # save the audio frames as .wav file
    wavefile = wave.open(wav_output_filename,'wb')
    wavefile.setnchannels(chans)
    wavefile.setsampwidth(audio.get_sample_size(form_1))
    wavefile.setframerate(samp_rate)
    wavefile.writeframes(b''.join(frames))
    wavefile.close()
    time.sleep(0.1)