scale.py

import pyaudio
import matplotlib.pyplot as plt
import numpy as np
PyAudio = pyaudio.PyAudio
from scipy.io.wavfile import write

def sound_wave(wave, fs):
    p = PyAudio()
    stream = p.open(format = pyaudio.paFloat32, channels = 1, rate = fs, output = True)
    stream.write(wave)
    stream.stop_stream()
    stream.close()
    p.terminate()
    
def save_wave(wave, fs, name):
    write(name, fs, wave)
    
fs = 44100 # sampling rate = 1/s
ts = 1/fs
duration = 2 # seconds
sampling_points = duration*fs

notas_freqs = {
    'do': 261.63,
    're': 293.66,
    'mi': 329.63,
    'fa': 349.23,
    'sol': 392,
    'la': 440,
    'si': 493.88
}

plt.figure(figsize=[15,5])
t = np.linspace(0.0, duration, sampling_points)
samples_bytes = {}
scale_samples = []

for nota in notas_freqs: 
    samples = (np.sin(2 * np.pi * t * notas_freqs[nota])).astype(np.float32)
    samples_bytes[nota] = samples.tobytes()
    scale_samples.append(samples)
    plt.plot(t[:200],samples[:200],'-+', )
plt.legend(notes.keys())
plt.savefig('scale.svg')

for nota in notas_freqs:
    print(f"Escuchando: {nota}")
    sound_wave(samples_bytes[nota], fs)
    
save_wave(np.concatenate(scale_samples), fs, "scale.wav")