Best way for pitch shift in MATLAB

Asked Jan 02 '19 at 13:17

Active Jan 02 '19 at 13:17

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I'm writing a program which, with a given value prompted from the user, changes the pitch of a whole track, for example if the user wants to double the fundamental the program should produce a track an upper octave (example, from A4 to A5). I have tried this

changing the pitch of an audio wav file in matlab?

and this

MATLAB - Pitch Shifting an Audio Signal

But nothing worked. The commented part is my test to use the second algorythm, but it doesn't compile.

Here is my code.

 [audioIn,fs] = audioread('Silae.wav');
 [f0,idx] = pitch(audioIn,fs);

 subplot(2,1,1)
 plot(audioIn)
 ylabel('Amplitude')

 subplot(2,1,2)
 plot(idx,f0)
 ylabel('Pitch (Hz)')
 xlabel('Sample Number')

 %audiowrite('Silae.wav',2*fs,'trasposed.wav')   2+fs is the given ratio

Thank you for your help.

asked Jan 02 '19 at 13:17

Lory97

1

Have you read [the help for `audiowrite`](https://uk.mathworks.com/help/matlab/ref/audiowrite.html)? – nekomatic Jan 02 '19 at 14:52
1

You say "it doesn't compile"? What does that mean exactly? It would be helpful if you posted the error message you're seeing. – Justin Jan 02 '19 at 14:56
Yes, i have. ERROR CODE: Error in (line 13) audiowrite('Silae.wav',2*fs,'trasposto.wav'), and i don't know how to plot the result. – Lory97 Jan 06 '19 at 09:55
Can you explain what happen when you say "But nothing worked". – alpereira7 Jan 29 '19 at 13:39
None of these solution compiled. – Lory97 Jan 30 '19 at 09:57
Please read this article, it should work: [A Phase Vocoder in Matlab](https://labrosa.ee.columbia.edu/matlab/pvoc/) – alpereira7 Jan 31 '19 at 09:54
Thanks for linking, but when i try to read a file it gives me this error: Invalid use of operator. – Lory97 Jan 31 '19 at 12:47

Best way for pitch shift in MATLAB

0 Answers0