error in the code

t=linspace(0,2,16000);

sol=sin(2*pi*392*t);

si=sin(2*pi*493.88*t);

la=sin(2*pi*440*t);

soundsc([si; la; sol; la; si; si; si])

I wrote this code but from imsefuenti errors:

Error in soundsc (line 63)

sound(varargin{:});

Error in untitled3 (line 5)

soundsc([si; la; sol; la; si; si; si])

Answer 1

[Dave B]

It looks like you're passing in a matrix, but I think you want to pass in a vector. Try transposing t?

t=linspace(0,2,16000)'; 
sol=sin(2*pi*392*t); 
si=sin(2*pi*493.88*t);
la=sin(2*pi*440*t); 
soundsc([si; la; sol; la; si; si; si])

Answer 2

[Jan]

You create a [7 x 16000] matrix and ask soundsc to play it. The error message is:

Error using sound (line 76)
Only one- and two-channel audio supported.

(You left out this most important part of the message - please post the complete message in future questions). Solution: Define the time as column vector:

t   = linspace(0,2,16000).'; 
%                        ^^
sol = sin(2*pi*392*t); 
si  = sin(2*pi*493.88*t);
la  = sin(2*pi*440*t); 
soundsc([si; la; sol; la; si; si; si])

[Giovanni Scamardo]

could you tell me how to write?

[Jan]

I do not understand your question. I've posted running code already and marked the difference with "^^". If t is a column vector, sol, si and la are column vectors also. Then [si; la] creates a column vector.

Remember: [a,b] concates horizontally, [a;b] vertically. Try it:

a = rand(2, 2);
b = rand(2, 2);
size([a; b])

ans = 1×2

4 2

size([a, b])

ans = 1×2

2 4