Sum sound signals with different size

Hello,

I want to produce a sound from a sound_signal, but I don't know how to create the sound signal.

I have a cell sequence like that as input

{'0'} {'111'} {'0'} {'111'} {'0'} {'0'} {'0'} {'1'} {'0'} {'111'} {'0'}

Now my code looks like this:

dot_duration = 0.1
sampling_freq = 1000
tone_freq = 700

t_dot=0:1/sampling_freq:dot_duration;
t_dash=0:1/sampling_freq:3*dot_duration;
t_code_space=0:1/sampling_freq:dot_duration;

y_dot=cos(2*pi*tone_freq*t_dot);
y_dash=cos(2*pi*tone_freq*t_dash);
y_code_space=0*t_code_space;

input = reshape(pulse_sequential, 1, 1, length(input));
%with the reshape I avoid the use of loops
soundsignal1 = ismember(input(:), '1')*y_dot;
soundsignal2 = ismember(input(:), '111')*y_dash;
soundsignal3 = ismember(input(:), '0')*y_code_space;

soundsignal = soundsignal1+soundsignal2+soundsignal3

My problem is in the sum of the soundsignal1, soundsignal2 and soundsignal3, but obviously I can not add those elements because the Matrix dimensions do not agree.

I don't know how to solve this error, I understand it, (y_dot, y_dash and y_code_space have different size).

If you could help me I would grateful

Answer 1

[Mohamad]

y_dot=[y_dot zeros(1,length(y_dash)-length(y_dot))];% pad zeros 
y_code_space=[y_code_space zeros(1,length(y_dash)-length(y_code_space))];% pad zeros

Now all vectors of same length , can be added .

[Raquel Lucena Peris]

It is true that this work to add the different sound signals, but if I try to do this:

     sound(soundsignal, sampling_freq)

Error using sound (line 76)

Only one- and two-channel audio supported.

Do you know how can I reproduce the sound?

Thanks

[Mohamad]

what is the size of soundsignal ?

[Raquel Lucena Peris]

the size is

ans =

84 48001

[Mohamad]

Why the matrix has 48001 columns ?

sound command will allow playing the sound for a matrix of 2 columns only ( i.e 1st channel and 2 ed channel ) .