make a vector from wave sound
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[x,fs,nbits] = wavread('w.wav');
%sound(x,fs);
h = zeros(1,4000);
h(1) = 1;
h(1000) = 0.25;
h(2000) = (1/16);
h(3000) = 1/64;
h(4000) = 1/256;
y = conv(x,h);
y = y/max(y);
sound(y,fs);
it gives me an error "A and B must be vectors" as for y = conv(x,h) .
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Answers (2)
Star Strider
on 29 Sep 2015
Check the size of ‘x’. It may be a two-column matrix (one column for each channel).
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Star Strider
on 29 Sep 2015
Not strictly 2D but do the same convolution on both channels, or if the same sound is duplicated in both channels, just one column of ‘x’ with your current code.
Image Analyst
on 29 Sep 2015
You could do one 2D convolution or 2 1-D covolutions
rightChannel = x(:, 1);
echoRight = conv(rightChannel, h, 'same');
leftChannel = x(:, 2);
echoLeft = conv(leftChannel , h, 'same');
% Combine
newSignal = [echoRight, echoLeft];
or something like that.
Image Analyst
on 29 Sep 2015
Maybe try
y = conv2(x, [h,h], 'same');
or
y = conv2(x,[h;h], 'same');
so you're doing a 2D convolution
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