import soundbox
import numpy as np
import scipy.signal as sig
import matplotlib
import matplotlib.pyplot as plt

signal = soundbox.load_signal('out.wav')

freq, time, fts = sig.stft(signal, soundbox.samp_rate, nperseg=soundbox.samp_rate * 0.5)

fig, ax = plt.subplots()
ax.pcolormesh(
    time, freq,
    np.abs(fts),
    cmap='plasma',
    shading='gouraud')


def freq_format(value, pos):
    return f'{value:.0f} Hz'


def time_format(value, pos):
    return f'{value:.0f} s'


ax.set_xlabel('Temps')
ax.xaxis.set_major_formatter(matplotlib.ticker.FuncFormatter(time_format))

ax.set_ylabel('Fréquence')
ax.set_ylim(0, 800)
ax.yaxis.set_major_formatter(matplotlib.ticker.FuncFormatter(freq_format))

plt.show()