how to change speed not pitch ?

Question

sofiane benhamza 2022-9-22

回答： Garv Agarwal 2023-6-19

Hello Communiy

firstly , i've read all the questions and answers that looks like my question

how can i change the speed of a signal keeping the pitch constant

my first methode fail

play( audioplayer( soundMatrice , f * 1.5 ); # this changes the pitch

so , i tried that

play( audioplayer( resample( soundMatrice, 3 , 2) , f ); # this also did

so can anyone help me please.

please don't comment with external links , i need an example.

Answer 1

Garv Agarwal 2023-6-19

Hi Sofiane,

As per my understanding, you have an audio signal, and you want to increase its speed without changing affecting its pitch.

You can do this using the stretchAudio function-

SignalOut = stretchAudio(SignalIn,Speed);
% Where Speed is the desired signal speed, for example for your case
% Speed=1.5

You can also try the below MATLAB example for this function -

openExample('audio/ApplyTimeScaleModificationExample')

For more details, you can refer to the following documentation on https://in.mathworks.com/help/audio/ref/stretchaudio.html