Abstract: A digital audio signal player a turntable unit, an actuating unit for the turntable unit, a circuit board arranged under the turntable unit, a magnet on an edge of a bottom of the turntable unit, an annular magnetism sensing plate on an upper side of the circuit board to face and sense the magnet, a light blocking plate secured on a shaft of the actuating unit, and a photointerrupters to sense the light blocking plate; thus, the magnet and the blocking plate will turn when the turntable unit is turned; the turning speed of the turntable unit is acquired by means of the magnetism sensing plate and the induction magnet while the turntable unit's turning direction is acquired by means of the photointerrupters and the light blocking plate; the turntable unit's turning speed can also be acquired by means of a light sensing plate and a reflection sensor instead.

Abstract: A dual-use audio signal player includes a CD playing mechanism, a direct driver mechanism, a special disk capable of being manually angularly displaced relative to the direct driver mechanism, and a sensor mechanism electrically connected to the CD playing mechanism and capable of detecting the way the special disk is moved; the special disk is to be operated for simulating a vinyl analogue record being manually moved while the record is being played; when the special disk is operated with a person's hand, the CD playing mechanism will process music data in accordance with movement of the special disk as detected by the sensor mechanism, and special effects will be produced while the music is being played through the CD playing mechanism.

Abstract: A dual-use audio signal player includes a first turntable for a CD to be loaded thereon, a processing circuit, a second turntable, and a shank for connection with a pick-up to be used with the second turntable; the shank is connected to the processing circuit; an analogue record can be manually turned at various speeds and in selected directions to accordingly change the way the analogue record is played for special effects when the record is loaded on the second turntable; audio signals of the CD on the first turntable, after having been stored in a dynamic random access memory, can be played for special effects according to the way an especially made digital record is manually turned when the especially made digital record is loaded on the second turntable instead of the analogue record, and when a digital pick-up is connected to the shank instead of an original analogue pick-up.