For people with tradingview alarms that go off in the middle of the night.

mute_sound.py

import alsaaudio
import schedule
import time

MUTE_TIME = 19
UNMUTED = [False, False]
MUTED = [True, True]


def job():
    current_hour = time.localtime().tm_hour
    print("current hour:", current_hour)

    if current_hour > MUTE_TIME:
        mixer = alsaaudio.Mixer()
        volume = mixer.getvolume()
        if mixer.getmute() == UNMUTED:
            print("muting sound.")
            mixer.setmute(True)


schedule.every(1).minutes.do(job)

while True:
    schedule.run_pending()
    time.sleep(1)