PORTABLE SOUND REPRODUCING AND LOUDSPEAKING DEVICE WITH AUTIMATIC PROGRAM SEARCHING CIRCUIT FUR MUSIC SELECTION

摘要

PURPOSE:To realize an automatic music selection program searching function suitable for 'KARAIKE' (orchestration without lyrics) while maintaining the respective characteristics of low power consumption, low cost,light weight and small-size in a portable 'KARAOKE' device. CONSTITUTION:By a switching decision circuit 10, a music selection mode signal (a) is sent based on the switching state of leaf switchs S1, S2 and S3 interlocking to the control button of a tape deck, by an intermusic stopping signal (b) from an intermusic stopping circuit 68 and a motor driving circuit 50 is stopped when the counted value of an up-down counter 66 set by a music selection button S4 is zero. By the motor driving circuit 50, a stop detecting signal (d) in sent to a high frequency oscillator 30 in an intermusic stopping state, by a forced stop deciding circuit 40, a forced stop signal (e) is sent to a low frequency oscillator 20 and the high frequency oscillator 30 in a forced stop state and a intermittent sound is outputted from a speaker 73 by an informing signal (g) from the high frequency oscillator 30 modulated with a flashing on and off signal (f) respectively.