Resample type Pitch Shift Effect without crossfading

pitch_shift_resample_wo_crossfade.py

from pydub import AudioSegment
import numpy as np
from pydub.playback import play

buflen = 2000

rate = 2.0
buf = np.zeros(buflen)

sound = AudioSegment.from_file("input.wav", "wav")
samples = np.array(sound.get_array_of_samples())
sample = samples[::sound.channels]

rpf = 0
rp1 = 0
wp = 0
result = np.zeros(len(sample))
gain1 = 1.0

#Processing loop
for i in range(len(sample)):
    buf[wp] = sample[i] #Write sample to the ring buffer
    out1 = buf[rp1] #Read sample from the ring buffer 
    result[i] = out1

    #Update write pointer and read pointer
    wp = (wp + 1) % buflen
    rpf = rpf + rate
    rp1 = int(round(rpf)) % buflen

test = AudioSegment(result.real.astype("int16").tobytes(), sample_width=sound.sample_width, frame_rate=sound.frame_rate, channels = 1)
test.export("output.wav", format="wav")
play(test)