changing frequency of an existing audio

11 次查看(过去 30 天)
hi i have wrote a simple code as the following.
[y,fs] = audioread("Sound.wav");
sound(y,fs);
i know that i can change the sampling frequency of it by changing the "fs" value, my question is how can i change the frequency of the existing audio, i want it to play at 1000 hz for example.

采纳的回答

Mathieu NOE
Mathieu NOE 2022-8-22
hello
the question is not 100 % clear to me
if you want to play the same signal to a different pitch , you can simply do
newfs = 1000;
sound(y,newfs);
but as the signal has not been resampled , the pitch will be different as if you had played it with the original sampling frequency fs
if you want to have the same pitch , you need also to resample / decimate the data
here is an example how to decimate the data (multi channel case here) , assuming the new sampling rate is a integer factor lower compared to the original sampling rate :
%% decimate (if needed)
% NB : decim = 1 will do nothing (output = input)
decim = 1;
if decim>1
for ck = 1:channels
newsignal(:,ck) = decimate(signal(:,ck),decim);
newfs = fs/decim;
end
end

更多回答(0 个)

类别

Help CenterFile Exchange 中查找有关 Multirate Signal Processing 的更多信息

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by