PITCH.py

import numpy as np
import random
import itertools
import librosa
import IPython.display as ipd
import matplotlib.pyplot as plt

def stretch(data,rate=1):
    input_length = 440000
    data=librosa.effects.time_stretch(data,rate)
    return data
def pitch(data,sr,pitch_factor):
    return librosa.effects.pitch_shift(data,sr,pitch_factor)

def load_audio_file(file_path):
    input_length = 440000
    data = librosa.core.load(file_path,sr=22050)[0] #, sr=16000
    if len(data)>input_length:
        data = data[:input_length]
    else:
        data = np.pad(data, (0, max(0, input_length - len(data))), "constant")
    return data
sr=22050
data = load_audio_file("haruhi.wav")
pitch_data=pitch(data,sr,5.0)
librosa.output.write_wav('pitch5.0_haruhi.wav', pitch_data,sr)