Extensible template for basic audio creation and playback using python with pygame.
Requires pygame and any version of python that supports type hints.
In audio.py, the class PygAudio provides an easy way to create audio with different waveforms and modulation functions, and is extensible with any custom functions. Basic waveforms and modulation functions come with the class. The class also allows for playback using pygame.
from pygaudio import PygAudio
rel_amp = 0.4 # relative limit on amplitude
sample_rate = 44100 # number of samples per second
seconds = 10 # playback length
f = 200 # frequency of sine wave
r_f = 1 # relative amplitude of sine wave
audio = PygAudio(sample_rate=sample_rate, relative_amp=rel_amp)
audio.construct_time(seconds=seconds)
audio.create_wave(wave_func=PygAudio.sin, frequency=f, amplitude=r_f)
audio.play_sound(vol_func=PygAudio.constant_volume)
from pygaudio import PygAudio
rel_amp = 0.4 # relative limit on amplitude
sample_rate = 44100 # number of samples per second
seconds = 10 # playback length
fs = [200, 300] # frequencies of sine wave
r_fs = [1, 0.5] # relative amplitudes of sine waves
audio = PygAudio(sample_rate=sample_rate, relative_amp=rel_amp)
audio.construct_time(seconds=seconds)
for f, r_f in zip(fs, r_fs):
audio.create_wave(wave_func=PygAudio.sin, frequency=f, amplitude=r_f)
audio.play_sound(vol_func=PygAudio.constant_volume)
from pygaudio import PygAudio
rel_amp = 0.4 # relative limit on amplitude
sample_rate = 44100 # number of samples per second
seconds = 10 # playback length
fs = [200, 300] # frequencies of sine wave
r_fs = [1, 0.5] # relative amplitudes of sine waves
audio = PygAudio(sample_rate=sample_rate, relative_amp=rel_amp)
audio.construct_time(seconds=seconds)
for f, r_f in zip(fs, r_fs):
audio.create_wave(wave_func=PygAudio.sin, frequency=f, amplitude=r_f)
audio.play_sound(vol_func=PygAudio.linear_volume)
The functions wave_func and vol_func are extensible as long as they follow the template defined in their corresponding type hints.
wave_func: Vectorized mapping from time to amplitude. Converts an array of time values t into a corresponding amplitude array. E.g. lambda t, f, A: A * np.sin(2 * np.pi * f * t) representing a sine wave.
vol_func: Vectorized mapping from time to volume modulation (from 0 to 1). 1 corresponds to no change in volume, 0 corresponds to 0 volume. Converts an array of time values t into a corresponding modulation array that will be element-wise multiplied with the overall array containing the amplitudes.