Show microphone level in realtime using pyaudio.

pyaudio-test.py

import pyaudio
import audioop

p = pyaudio.PyAudio()

stream = p.open(format=pyaudio.paInt16,
                channels=1,
                rate=44100,
                input=True,
                frames_per_buffer=1024)

try:
    while True:
        data = stream.read(1024)
        rms = audioop.rms(data, 2)
        max_n = 100
        n = min(int(rms//2), max_n)
        blank = max_n - n
        print(f"RMS: {n *'█'}{blank*' '}", end='\r')

except KeyboardInterrupt:
    stream.stop_stream()
    stream.close()
    p.terminate()
    print()