I cant work out whick way to structure this code. Multiple functions with multiple inputs/outputs

function [ fs, f0, d, t, y, call ] = CallingFunction()
%UNTITLED2 Summary of this function goes here
%   Detailed explanation goes here

end

function [ f0,fs,d ] = Funktion1 (  )
% This function reads in Duration, Fundamental & Sample frequencies
%   Accepts inputs
f0 = input('Enter the Fundamental frequency, :');
fs = input('Enter the Sample frequency, :');
d = input('Enter the Duration, :');

end

function [ t, y ] = Funktion2( f0 , fs , d )
%UNTITLED4 Summary of this function goes here

%   Creates Time vector & Sinusoid vector
t=0:1/fs:d; 
y1=sin(2*pi*f0*t); 
y2=sin(2*pi*2*f0*t); 
y3=sin(2*pi*3*f0*t); 
y=y1+y2+y3;

end

function [  ] = Funktion3( fs , t , y )
%%Plot & play results
% Read in decay parameters
K = input('Value of K; :');
%%Create exp decay fn 
A=(K*exp(-1.5*t)).*sin(2*pi*0.65*t); 
call=A.*y; 
%%Play through sound card & plot 
soundsc(call,fs) 
plot(t,call) 

end

Answer 1

[Star Strider]

Just guessing here, because I’m not certain what you’re doing.

Perhaps this will do what you want:

function [ fs, f0, d, t, y, call ] = CallingFunction()
%UNTITLED2 Summary of this function goes here
%   Detailed explanation goes here

[ f0,fs,d ] = Funktion1;
[ t, y ] = Funktion2( f0 , fs , d );
Funktion3( fs , t , y );

end

Also, define whatever you want your ‘call’ variable to be, somewhere in ‘CallingFunction’. If you don’t, it will throw an error that ‘call’ is unassigned.

[Gary]

Thanks Star Strider. It's coming together apart from this error

>> CallingFunction
Enter the Fundamental frequency, :700
Enter the Sample frequency, :780
Enter the Duration, :600
16  end
Value of K; :4
Error using sound (line 76)
Device Error: Invalid sample rate

Error in soundsc (line 55)
sound(varargin{:});

Error in CallingFunction>Funktion3 (line 37)
soundsc(call,fs)

Error in CallingFunction (line 6)
Funktion3( fs , t , y );

[Gary]

I've adjusted my frequencies and it now works. Many thanks

[Star Strider]

You most likely need to suggest a range of sample rates and check to be certain the sample rate is correct. See the documentation for soundsc for details.

The sample rate (sampling frequency) needs to be at least twice the highest frequency of the signal.

[Star Strider]

My pleasure!