I noticed a bunch of threads discussing multi-slide slider objects, but couldn't find any that suited my needs. I've tested this code on multiple platforms, but since this is my first posting attempt there may be incompatibilities - feel free to comment and let me know if you run into these or any other issues.

For a basic demonstration, create the following function and place it in the same folder as superSlider:
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% Demonstration of the superSlider "object". This function generates a new randomly oriented slider each time the callback is executed.

function sliderCallbackTest(hObject, eventData)

n = .1 + .8*rand(1); %random location for the new slider

% Recursive callback:
slider11 = superSlider(gcf, 'numSlides', 2,'controlColor',[.5 .1 .5],...
'position',[n .05 .05 .7],'stepSize',.1,...
'callback',@sliderCallbackTest);