pyaudio_record_and_play.py

import pyaudio
import wave
import sys

"""" ------------------------------------------------------------ """
""" ------------------------- RECORD ---------------------------- """
""" ------------------------------------------------------------- """

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)

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()

""" ------------------------------------------------------------- """
""" -------------------------- PLAY ----------------------------- """
""" ------------------------------------------------------------- """

CHUNK = 1024

wf = wave.open("output.wav", 'rb')

print("* starting pyaudio")
p = pyaudio.PyAudio()

print("* opening stream")
stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                channels=wf.getnchannels(),
                rate=wf.getframerate(),
                output=True)

print("* reading frames")

data = wf.readframes(CHUNK)

print("* looping thru stream")
while data != b'':
    stream.write(data)
    data = wf.readframes(CHUNK)


print("* stopping stream")
stream.stop_stream()

print("* closing stream")
stream.close()

print("* terminating pyaudio")
p.terminate()

print("* exiting")
sys.exit(0)