-
-
Save jkrukowski/7b1fe8a6cc7a958a3715d76319f0cbb6 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
from scipy.io import wavfile | |
import scipy.io | |
from scipy.fft import fft, ifft | |
import numpy as np | |
""" | |
chord.wav should be a short sound, equivalent to carrier in vocoder | |
impulse.wav should be a quite sparse transient heavy sound, equivalent to modulator in vocoder | |
play with tsmear and asmear to tweak between vocoder and convolution like sound | |
""" | |
Tsmear = 1000 | |
Asmear = 100 | |
polar2z = lambda r,θ:r*np.exp(1j*θ) | |
z2polar = lambda z:(np.abs(z),np.angle(z)) | |
samplerate,data = wavfile.read("chord.wav") | |
Xl = data[:,0] | |
Xr = data[:,1] | |
samplerate,phasedata = wavfile.read("impulse.wav") | |
X2l = phasedata[:,0] | |
X2r = phasedata[:,1] | |
X2l = np.convolve(X2l,np.random.rand(Tsmear)-0.5,mode="same") #time smear template | |
X2r = np.convolve(X2r,np.random.rand(Tsmear)-0.5,mode="same") #time smear template | |
Xl = np.resize(Xl,len(X2l)) | |
Xr = np.resize(Xr,len(X2r)) | |
convAl = fft(Xl) | |
convPl = fft(X2l) | |
convAr = fft(Xr) | |
convPr = fft(X2r) | |
YAl = z2polar(convAl) | |
YPl = z2polar(convPl) | |
YAr = z2polar(convAr) | |
YPr = z2polar(convPr) | |
Amaskl = np.convolve(YAl[0],np.hamming(Asmear),mode="same") #blur amplitude of pad file and multiply w/amplitude of tmplate | |
Amaskr = np.convolve(YAr[0],np.hamming(Asmear),mode="same") #blur amplitude of pad file and multiply w/amplitude of tmplate | |
Yl = polar2z(YPl[0]*Amaskl,YPl[1]) | |
Yr = polar2z(YPr[0]*Amaskl,YPr[1]) | |
Xl = ifft(Yl) | |
Xr = ifft(Yr) | |
Xl = np.real(Xl) | |
Xr = np.real(Xr) | |
Xl = Xl/np.max(np.abs([Xl,Xr])) | |
Xr = Xr/np.max(np.abs([Xl,Xr])) | |
wavfile.write("output.wav", samplerate, np.array([Xl,Xr]).T) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment