how to adjust plot with GUI slider without GUIDE

I have a plot that is a sound wave and can be played. I am trying to make a slider that will change the values of w, y, b, and z which will change the linspace and then change the sound in real time. So far I have only made a slider that will adjust the W value. For some reason it will not work. I have no error message, but nothing is changing. What could be the possible issue? thanks

here is a sample of my code

    figure 

    c1=uicontrol('style','pushbutton',...;
        'position',[100 50 75 600],... ;%[ left right, up down, width, height]
        'backgroundcolor','w',...;
        'callback',@sound_g,...;
        'string','G'),...

    function sound_g(~,~) 
    Fs=6000;  
     Ts=1/Fs;
    w=1000;
    y=2000;
    b=3000;
    z=4000;
     a = linspace(.5, 1, w);
    d = linspace(1, .5, y );
    s = linspace(0.5, 0.1, b );
    r = linspace(.1, 0, z);
    adsr = [a d s r];
    t=[0:length(adsr)-1] ;
     fc=392; 
     y=sin(2*pi*fc*t/Fs);  
    o=y.*(adsr);
    sound(o,Fs)
    plot(o)

    SliderH = uicontrol('style','slider','position',[175 400 200 20],...
        'min', -10000, 'max', 10000);
    addlistener(SliderH, 'Value', 'PostSet', @slidercall);

function slidercall(source, eventdata)

        end
    end

[Walter Roberson]

What is LineH and why are you setting its YData?

Answer 1

[Rik]

You don't use the actual value of the slider, so nothing will change.

function sound_g(hObject,~)
val=get(hObject,'Value');

And why do you create a slider inside the callback?

[bella bridges]

For my own use I don't put the slider in the callback, it is in my figure instead. It is just like this to be compact in my question.

[Rik]

I still see no indication of where you get the Value from the slider object.

[Walter Roberson]

Creating the slider inside the callback is needed for to be able to set its Callback property to a handle to the nested function slidercall . slidercall is deliberately nested because it shares variables with sound_g

Note though that you are creating a new slider in the same position every time you push the button.