Variable slippage control for a disk jockey control surface
View Patent ↗The disclosure pertains to a scratch effect controller for use by a disk jockey, wherein at least one electromagnet creates the slippage tension or friction effect between the user manipulated disc, which includes a vinyl-like surface thereby simulating a vinyl record, and the rotatable or fixed platter. The strength of the electromagnet is variable so as to create a variable slippage tension or friction effect.
1. A device for producing scratch effects in a digitized audio signal, comprising:
a rotating platter which is free of motor driving;
a user manipulated disc including magnetic material, said user manipulated disc impinging against said rotating platter, rotating about a common axis and being free of motor driving; and
at least one electromagnet spaced and with polarity oriented with respect to said user manipulated disc for attracting said user manipulated disc thereby increasing a force urging said user manipulated disc against said rotating platter.
2. The device of claim 1 further including a circuit for varying magnetic strength of said at least one electromagnet.
3. The device of claim 2 wherein an upper surface of said user manipulated disc simulates a vinyl record.
4. The device of claim 3 wherein said upper surface of said user manipulated disc includes an encoding pattern.
5. The device of claim 4 further including a detector for detecting motion of said user manipulated disc and producing a scratch effect in response thereto.
6. The device of claim 5 wherein said rotating platter has rotational inertia sufficient for a user to vary a rotational speed of said user manipulated disc to be different from a rotational speed of said rotating platter.
7. The device of claim 6 wherein a lower surface of said user manipulated disc includes polytetrafluoroethylene.
8. The device of claim 5 wherein the scratch effect produced is proportional to rotational acceleration of said user manipulated disc.
9. The device of claim 1 wherein the device communicates with a computer or processor.