Patent ID: 6745091
Filing Date: 2004-06-01
Classification: G11B

Abstract:
A digital audio signal player having a simulated analogue record, comprisinga microprocessor; a high frequency amplifier, the high frequency amplifier being electrically connected to the microprocessor to send out laser light when activated by the microprocessor; a CD digital processor electrically connected to both the microprocessor and the high frequency amplifier; the CD digital processor informing the microprocessor of status of focusing of the laser light; the microprocessor stopping working when the laser light fails to focus; the microprocessor activating a CD driving motor to rotate a CD turntable at twice a normal speed when the laser light succeeds in focusing; a digital audio signal processor electrically connected to both the microprocessor and the CD digital processor; a laser pick-up electrically connected to the high frequency amplifier; the laser pick-up sending data of the CD to the CD digital processor; the digital audio signal processor including a dynamic RAM to store the data of the CD with which; a digital/analog converter electrically connected to the digital audio signal processor for converting the digital data of the RAM into analogue ones, which are then sent through a low pass filter and played as music; a control element electrically connected to the microprocessor; the control element being made of conductive materials; the control element having a light sensitive device, which is electrically connected to the digital audio signal processor, and will sense speed and direction of movement of the control element; and, a detecting circuit electrically connected to both the microprocessor and the control element; the detecting circuit being capable of detecting interfering signals which are produced when the control element is touched by a person's hands; the interfering signals being sent to the microprocessor so that the same makes the digital audio signal processor send out data of music in the RAM with speed and direction changing according to the movement of the control element when deciding that a person's hands are contacting the control element; and being characterized by both a special memory activating button and a special-function activating button provided on the control panel; the dynamic RAM being made to mark those portions of musical data that are suitable for special effect by means of operating the special memory activating button during a course of the suitable portions being played; when the special-function activating button is pressed to an on position, the marked suitable portions of musical data being located as soon as the microprocessor decides that a DJ is touching the control element with his hands, thus being played immediately and with speed and direction changing in a manner according to the movement of the control element.