There is two items for this idea to work.
(Optional) - an instruction manual
What is it? It is a super cheap budget Computer DJ system so that people like cash starved students, can explore the fun world of mixing and scratching.
The main part of this
system is the turntable, which is essentially a flat wooden board, with a free spinning turntable/vinyl on top of it. To use this board with the software, you should place and lock your mouse on a side of the scratching disk. The mouse is held in place by a simple clamp, to keep the mouse is as close as possible to the surface of the vinyl. The surface of the vinyl that the mouse head would travel around feels rough, and contains contrasting patterns so that it works well with both ball and optical types of mouse.
The turntable is then used like a normal turntable, by spinning the board, which can spin freely via the use of low friction ball bearing.
The software then interprets the motion of the mouse to scratch the music. However when you want to use the cross fader, by pressing tab, or a key, (Or event the mouse button) the turntable no longer controls the scratching. Instead it is controlling the Crossfader, Volume control, or even song selection.
And so that brings us, a incredible way to make new songs without killing our purse.
The turntable would not cost $400 - $1500 now, but instead can be as cheap as $20 and still be high quality. This ensures the increase appreciation of the world of music to newbies as well as their parents.