python audio vu meter L R

vu_meter.py

import pyaudio
import numpy as np
import time

CHUNK = 2**11

p = pyaudio.PyAudio()

stream = p.open(format=pyaudio.paInt16, channels=2, rate=44100, input=True, input_device_index=5, frames_per_buffer=CHUNK)

while True:
    data = np.fromstring(stream.read(CHUNK), dtype=np.int16)
    L = np.average(np.abs(data[0::2])) * 5
    R = np.average(np.abs(data[1::2])) * 5
    LB = "|" * int(50 * L / 2 ** 16)
    RB = "|" * int(50 * R / 2 ** 16)
    print(f'L {LB}')
    print(f'R {RB}')
    time.sleep(0.1)