audiohandy.py

import numpy as np
import simpleaudio as sa
import threading
import time

def play_tone(freq, dur, delay):
    # Wait for the specified delay before playing the tone
    time.sleep(delay)
    
    # Sample rate (samples per second)
    sample_rate = 44100

    # Generate array with dur*sample_rate steps, ranging between 0 and dur
    t = np.linspace(0, dur, int(dur * sample_rate), False)

    # Generate a sine wave of frequency freq
    note = np.sin(freq * t * 2 * np.pi)

    # Ensure that highest value is in 16-bit range
    audio = note * (2**15 - 1) / np.max(np.abs(note))
    audio = audio.astype(np.int16)

    # Start playback
    play_obj = sa.play_buffer(audio, 1, 2, sample_rate)

    # Wait for playback to finish
    play_obj.wait_done()

def tone(freq, dur=0.2, bg=False, delay=0):
    if bg:
        # Run play_tone in a background thread with the specified delay
        thread = threading.Thread(target=play_tone, args=(freq, dur, delay))
        thread.start()
    else:
        # Play tone in the foreground with the specified delay
        play_tone(freq, dur, delay)

# Example usage
if __name__ == "__main__":
    tone(440, 0.5, delay=1)  # Play an A4 note for 0.5 seconds after a 1-second delay in the foreground
    tone(880, 0.5, bg=True, delay=2)  # Play an A5 note for 0.5 seconds after a 2-second delay in the background