Let's create a new signal containing the instrument song and some noise. There are several ways to accomplish this in Matlab$/$Octave$,$ but in C$/$C$++,$ you need to use a loop. Create a Matlab$/$Octave script that creates the vector

instrNoise$[$n$]=$ instr$[$n$]+$ noise$[$n$]$

using a $$for$$ loop. Save the script with a name $($lab$1.$m$)$; and execute the script with

$>>$ lab$1$

NOTES:

$$TIP: the command length$($instr$)$ returns the number of samples that the DT signal instr has. Are the $2$ signals defined for any index n$?$

$$To define the ith position of a vector y in MATLAB$/$Octave$,$ you use y$($n$)$ instead of y$[$n$].$

$$Indices of vectors in MATLAB$/$Octave can only be $1$ or greater.

$$To avoid Matlab$/$Octave to print intermediary results, use $$;$$ after the command.