Unrecognized function or variable 'wavread'.

263 visualizzazioni (ultimi 30 giorni)
Nahum Sacay
Nahum Sacay il 21 Ago 2021
Commentato: Walter Roberson il 23 Ago 2021
I need help for my school activity my professor given to us, when i try the code there is "Unrecognized function or variable 'wavread'." on the first line of the code.
Here is the code:
[x,fs]=wavread('c:\matlab\work\waed.wav'); %read your waed.wav
xlen=length(x); %calculate the number of samples in the file
a=0.15; %initialize all constants
delay=0.4;
D=delay*fs
y=zerosz(size(x)); % create a matrix, the size of x for efficient an speedier operation
for i=D+1:1:xlen; % filter signal
y(i)=x(1)+a*x(i-D);
end:
sound(y,fs); %play the echo signal
plot(y) %add labels on plot use xlabel and ylabel
f=fft(y) %get the fast fourier transform of soundfile
whos %checks the variables used and the sizes check of out f
plot(abs(f)) %plot magnitude of the fft(frequency content of speech)
plot(abs(f(1:50000))) % plots a section of the fft
  2 Commenti
Nahum Sacay
Nahum Sacay il 23 Ago 2021
there is still unrecognized on the program
>> p = fullfile('D:\MATLAB\2021a,waed.wav');
>> [Y,Fs]=wavread(p);
Unrecognized function or variable 'wavread'.
Walter Roberson
Walter Roberson il 23 Ago 2021
Side note: passing a single quoted string into fullfile() will return back exactly the same string. You need to pass in multiple strings to get any useful result. And you made a mistake with comma before the file name
p = fullfile('D:', 'MATLAB', '2021a', 'waed.wav')
would potentially be valid and useful.

Accedi per commentare.

Risposte (2)

Simon Chan
Simon Chan il 21 Ago 2021
It requires Signal Processing Toolbox, type 'ver' in the Command WIndow to check whether you have the right Toolbox or not.
  2 Commenti
Nahum Sacay
Nahum Sacay il 23 Ago 2021
Thank you,I checked it and there is no Signal Processing Toolbox.
Walter Roberson
Walter Roberson il 23 Ago 2021
wavread() was removed as of R2015b. When it existed, it was in MATLAB itself, not in the Signal Processing Toolbox (unless it was in Signal Processing in a quite old release.)

Accedi per commentare.


Walter Roberson
Walter Roberson il 23 Ago 2021
wavread() was removed from MATLAB. The replacement code for you is
[x, fs] = audioread('c:\matlab\work\waed.wav'); %read your waed.wav
This does not need any extra toolboxes.

Tag

Prodotti

Community Treasure Hunt

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

Start Hunting!

Translated by