Error with audio from pushbutton

Hi! I am trying to make some pushbuttons in Matlab. When I press each pushbutton, I want that every one of them to play a sound. I have this error while pressing one of the buttons:

I get the same error for this line: x = A*s;. I am also plotting the graphs of each variable that I want to play as sound, and when I plot them, I don't get any error.

Could you please help me?

[Geoff Hayes]

@Monika Grezer - can you show all of the code for one of your push button callbacks? Also, please describe what A is, how many dimensions, what the line A = A/max(max(max(A))); is supposed to be doing.

[Walter Roberson]

Do you have a variable named max?

[Jan]

Sending code privately is not the nature of this forum. The idea is to provide help for free, if the solution is available for the community.

You cannot store 2 audio signals in a 2x2 matrix, because this matrix have 4 elements only. This would be an extremely short sound. The error message is possible only, if A has more than 3 dimensions. Check this again.

[Geoff Hayes]

@Monika Grezer So why is A empty? When you initialize as

A = abs(randn(n, m));

what is m? Could it be that this variable is set to zero?

[Walter Roberson]

push3 assumes that global variable A has been set, but your code here does not set it. Your first function builds and returns A, without storing it in the global A.

[Walter Roberson]

@Monika Grezer

You have that function

semnaleamestecate

that returns A as its second output.

In the place that you call semnaleamestecate you should be writing to the global A there (or in some calling function that you return A to.)

Answer 1

[Walter Roberson]

A = A ./ max(A(:));

My guess at the moment is that your A is empty.