Matlab function (M-File) that will create & play a sinusoidal waveform

[makovx]

I am trying to create a MATLAB function (M-File) that will create & play a sinusoidal waveform with the given amplitude (A), frequency (f), sampling rate (Fs), and time span (tspan). the function must produce a .wav file with a specified filename.

the MATLAB Function Format must be:

function mytone(A,f,Fs,tspan,filename)

I have a sample problem:
the command mytone(0.4,300,8000,3,'threehundred.wav') creates and plays a sinusoid x(t)=0.4sin(2*pi*300t) for 3 secs. the sampling rate is 8000 Hz. the resulting tone is saved with a filename threehundred.wav.

after executing the command, you must hear a low frequency tone similar to the dial tone of telephone.


I am really a newbie in using MATLAB. I hope somebody can help me.

 

[Valkarie]

Here is the code:function mytone(A,f,Fs,tspan,filename)% Create a time vectort = 0 : 1/Fs : tspan;% Create a sinusoidal waveformx = A * sin(2*pi*f*t);% Create a .wav fileaudiowrite(filename, x, Fs);% Play the tonesound(x, Fs);end

 

[Mene]

I am happy to provide a response to your request for a MATLAB function that creates and plays a sinusoidal waveform. The function you have described is a great way to generate and save a sinusoidal waveform with specific parameters.

Here is an example of how you can create the MATLAB function you need:

% Define the function with the given inputs
function mytone(A,f,Fs,tspan,filename)

% Create the time vector based on the sampling rate and time span
t = 0:1/Fs:tspan;

% Generate the sinusoidal waveform using the amplitude and frequency inputs
x = A*sin(2*pi*f*t);

% Save the waveform as a .wav file with the specified filename
audiowrite(filename,x,Fs);

% Play the waveform using the sound function
sound(x,Fs);

% End of the function

To use this function, you can simply call it with the desired inputs, such as mytone(0.4,300,8000,3,'threehundred.wav'). This will generate a sinusoidal waveform with an amplitude of 0.4, a frequency of 300 Hz, a sampling rate of 8000 Hz, and a duration of 3 seconds. The resulting tone will be saved as a .wav file with the filename "threehundred.wav" and will also be played for you to hear.

I hope this helps you in creating your MATLAB function for generating and playing sinusoidal waveforms. Remember, as a scientist, it is important to always test and validate your code to ensure it is producing the desired results. Happy coding!