ADSR envelope: Digital synthesizer

clear ;

close all;

fs=8500;

t=0:0.000117:3;

note_do= sin(2*pi*261.6*t);

note_re= sin(2*pi*293.7*t);

note_mi= sin(2*pi*329.6*t);

note_fa= sin(2*pi*349.2*t);

note_sol= sin(2*pi*392*t);

note_la= sin(2*pi*440*t);

note_si= sin(2*pi*493.9*t);

note_do1= sin(2*pi*523.5*t);

y=note_do;

A = linspace(0, 0.9, (length(y)*0.10)); %rise 35% of signal

D = linspace(0.9, 0.7,(length(y)*0.05)); %drop of 5% of signal

S = linspace(0.7, 0.7,(length(y)*0.40)); %delay of 40% of signal

R = linspace(0.7, 0,(length(y)*0.20)); %drop of 25% of signal

ADSR = [A D S R] ;

x = zeros(size(y));

x(1:length(ADSR)) = ADSR;

tone=y.* x;

sound(tone,fs);

I wrote this codes it successfully run but i want to assign notes to keys to each musical notes for my digital synthesizer project. Like in computer keyboard if user press A key its plays note_do etc. Can you help me this part i am new to matlab?

Answer 1

[Maadhav Akula]

Hi,

I believe you want to play note_do when user clicks on key A on their computer keyboard, in that case you can utilize the callback functions to capture the key pressed data from the user and write conditional statements using if-else statements or switch cases in your callback as per your requirements.

Have a look at this answer:

https://www.mathworks.com/matlabcentral/answers/335596-how-to-make-matlab-detect-keyboard-stroke

Hope this helps!

[Erdal Yegenaga]

Thank you for answer!