Warp.py

# Warps a song 
import scipy.io.wavfile as wav
import numpy as np
import sys

if len(sys.argv) != 3:
    print sys.argv
    print("Error: Must run as: python Warp.py in.wav out.wav")
    sys.exit(1)

[pgm,i,o] = sys.argv

(sampleRate,data) = wav.read(i)

dtype = data.dtype
biggest = max(np.max(data), abs(np.min(data)))
data = data.astype(float)
data /= biggest
print np.max(data)
print np.min(data)
signs = np.sign(data)
data = signs * np.sqrt(np.abs(data))
data = np.sin(2*np.pi*data)

data *= biggest
data = data.astype(dtype)

wav.write(o,sampleRate,data)