import numpy as np
import simpleaudio as sa

SAMPLE_RATE = 8000


def get_sound(note, duration, volume=0.5):
    time_vector = np.linspace(0, duration, int(duration * SAMPLE_RATE), False)
    # frequency = 440 * 2 ** ((note - 49) / 12)  # 440Hz is key 49 on a piano
    frequency = 220 * 2 ** (note / 48)
    # Generate audio samples
    audio = np.sin(frequency * time_vector * 2 * np.pi)
    # normalize to 16-bit range
    audio *= volume * 32767 / np.max(np.abs(audio))

    # Fade out the end
    release_time = 0.05  # Seconds
    if duration >= release_time:
        release_samples = int(np.ceil(release_time * SAMPLE_RATE))
        fade_curve = np.linspace(volume, 0.0, num=release_samples)
        audio[-release_samples:] *= fade_curve

    # convert to 16-bit data
    audio = audio.astype(np.int16)
    return audio


##scale = [get_sound(note, 0.5) for note in [49, 51, 52, 54, 56, 57, 59, 61]]
##for note in scale:
##    wave_object = sa.WaveObject(note, 1, 2, SAMPLE_RATE)
##    play_object = wave_object.play()
##    play_object.wait_done()

blips = [get_sound(i, 0.1) for i in range(48, 92, 1)]

for blip in blips:
     wave_object = sa.WaveObject(blip, 1, 2, SAMPLE_RATE)
     play_object = wave_object.play()
     play_object.wait_done()

blips = [get_sound(i, 0.1) for i in range(48, 92, 1)]

for blip in blips[::-1]:
     wave_object = sa.WaveObject(blip, 1, 2, SAMPLE_RATE)
     play_object = wave_object.play()
     play_object.wait_done()