How to change audio playback speed using Pydub?

by 
from pydub import AudioSegment
from pydub import effects

root = r'audio.wav'
velocidad_X = 1.5 # No puede estar por debajo de 1.0

sound = AudioSegment.from_file(root)
so = sound.speedup(velocidad_X, 150, 25)
so.export(root[:-4] + '_Out.mp3', format="mp3")

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