JPS5940382A - Automatic music selector of tape recorder - Google Patents

Abstract

PURPOSE:To prevent such a defect that an undesired music is mistakenly reproduced in case a switch is pushed in a period of the music interval signal, by providing a detector for music interval and an integration circuit which delays the output of the detector. CONSTITUTION:A music interval signal B is changed to a high level, and a play signal is delivered from a comparator 11. Then a driver 17 is shifted to a reproduction mode, and a reproduced signal A is delivered. The output B of a detector 3 is changed to a low level. The output D of a gate circuit 5 is applied to gate circuits 14 and 15 after passing through an integration circuit 6. The operations of switches 12 and 13 are effective only in a control switch accepting period for the circuits 14 and 15. When the 1st switch 12 is closed, the output of the circuit 14 sets a mechanism control circuit 16 under a review state through a gate circuit 19.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to automatic song selection in a tape recorder that sequentially reproduces only desired songs from a plurality of songs recorded on a magnetic tape.

Conventionally, when playing back a magnetic tape on which many songs have been recorded, the desired songs are stored in a memory circuit in advance, and only the desired songs are automatically played back in the order in which they are stored.
Other parts of the song are cued or reviewed, and when a memorized song is being played, a switch is provided to play the song again from the beginning.
It detects the gap between the song currently being played and the previously recorded song, and returns to review mode and playback mode. In such a device, if the above switch is pressed during the period U of the inter-song signal in the period from the detection of an inter-song to the start of performance, that is, the period U of the inter-song signal in FIG. For example, if you press the above switch when a song interval is detected by the rising edge of a non-recorded section and enters the playback state, playback will begin with the rising edge signal at the beginning of the previous song. This had the disadvantage that undesired songs would be played because of the delay. Also, if a switch is provided that stops the currently playing song and moves to the beginning of the next stored song number, the next stored song number may change to the current one for the same reason as stated above. The present invention solves the above-mentioned drawbacks, such as when the button is pressed during the interval of the inter-song signal U in FIG. This is done to eliminate the possibility of recording on a magnetic tape using the output of a detector that detects the interval between songs, an integrating circuit that delays the output of the detector, and a playback control signal of a mechanism control circuit that controls the magnetic tape drive and a gate circuit. There is a switch that allows you to sequentially play only the desired song from among the multiple songs that are being played, and in the playback state, commands the playback to start again from the beginning of the currently playing song only from the second after the start of the play until the end of the play. To provide an automatic music selection device for a tape recorder, which is provided with a switch for commanding a music selection operation to stop the current music number 1 and then proceed to the beginning of the next stored music number.

During playback during automatic song selection, the first switch commands the playback from the beginning of the currently playing song only from seconds after the start of play until the end of the play, and the first switch commands the playback of the currently playing song to stop. This automatic music selection device for a tape recorder is provided with a second switch for instructing a music selection operation to proceed to the beginning of the next stored music number.

Embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. A reproducing head that extracts magnetic changes recorded on the magnetic tape to be reproduced as a signal, and an amplifier 2 that amplifies the signal of the reproducing head 1. Detector detects the unrecorded part of the magnetic tape and outputs low level [L] in the recording part and high level [H] in the unrecorded part 39 Switch 7 to specify the song number, the song number is output in the order of the pressed switch. a memory circuit 8 that stores the content N of the song number to be played next in the memory circuit 8 and an up-down counter 10 that indicates the song number on which the magnetic tape is currently running.
A mechanism control circuit 16 consisting of a holding circuit and a drive circuit which operate the magnetic tape drive unit 17 in accordance with the comparator 11 and the color input of the comparator 11. A rotation detector 21 for detecting rotation of the reel of the magnetic tape drive device. The first switch 12. instructs to play the currently playing song again from the beginning. A second switch 13 that stops the currently playing song and instructs the selection operation to proceed to the beginning of the next stored song No. 6. Gate circuit 5
．． 9.14.15,18゜19,20. It consists of an integrating circuit 6.

Now, when the automatic music selection operation is activated, the mechanism control circuit 16 operates so that the magnetic tape starts winding and winds up at the groove. Nth track from the beginning of winding, N2th track,
When the N3 songs are stored in sequence, the mechanism control circuit 16 controls the magnetic tape drive from the winding operation to the cueing operation.

The inter-song signal of high level CH'l, which is the output of the detector 3 of the unrecorded portion of the recording signal, is sent to the mechanism control circuit 1.
6 is counted by an up/down counter 10 through gate circuits 18 and 9 so that it opens only during review, cue, and play.

The up/down counter IO is connected to the review output of the mechanism control circuit 16 and is connected to the wire 22 so that it functions as a down count only during the review period.

The memory circuit stores the track numbers in the order in which they are pressed in the switch 7, and outputs the track numbers in the order in which they are pressed first. In the comparator 11, the output M of the up/down counter 10
and the output N of the storage circuit 8, and when N>M, a cue signal is sent to the mechanism control circuit 16, when N=M, a playback signal, and when N<M, a review signal is sent to the mechanism control circuit 16.

The reproducing operation will be explained with reference to the timing chart of FIG.

In FIG. 2, the reproduced signal A, the output B of the detector 3, the output C of the inverter 4, the output of the gate circuit 5, and the fJt divider 6
2 is a timing chart of the output E, the play signal F of the mechanism control circuit 16, and the acceptance range G of the operation switch 12°13.

The inter-track signal B in FIG. 2 changes from low level [L] to low level [H], a play signal is output from the comparator 17-11 in FIG. 1, and the magnetic tape drive device 17 enters the playback state. Transition. (When the song is released, the performance of the song starts without being recorded and the playback signal A is output, and the output B of the detector 3 changes from high level [H] to low level [L].

The signal passes through an inverter 4 and is applied to one input of a gate circuit 5, which allows the signal to pass only in the reproducing state. The output of the gate circuit 5 passes through an integrating circuit 6 consisting of a diode DI, a resistor R1, and a capacitor C1 to the gate circuit 14.
Added to 15.

The gate circuits 14 and 15 in FIG. 2 only accept the operation switch in the range G. Indicates that the operation of IE2 (7') switches 12 and 13 is valid. 1st. second switch 1
When the first switch 12 is closed in the reception range of 2.13, the output of the gate circuit 14 puts the mechanism control circuit 16 into the review state through the gate circuit 19. At the same time, the output of the gate circuit 14 is the up/down counter 10.
The contents of are counted up to M+1 in advance. When the magnetic tape drive unit 17 detects the beginning of the nine songs during the review operation, it shifts to the playback state again. Similarly, when the second switch 13 is closed within the reception range of switches 12 and 13, the output of the gate circuit 15 is passed through the gate circuit 20 to clear the currently output track number of the memory circuit 8, and then to store it. Comparator 1 is output when the song number N2 is output.
1, the contents of the up-down counter are compared with M, and if N2 M, a cue operation is commanded. N2=M
, or N2) In the case of M, the contents of the up/down counter are counted up to M+1 in advance and a review operation is commanded.

As mentioned above, the first. By providing the second switch with a delay gate circuit using a reproduced signal, automatic music selection is possible without malfunction.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the operation of an embodiment of the present invention. 1 is a playback head, 2-digit amplifier, 3-digit detector, 6-digit integration circuit, 7 is a music selection switch, 8-digit memory circuit, 10 is a care tube down counter, 11 is a comparator, 12 is a first switch, 13 is a second switch, 16-piece mechanism control circuit, 17-piece magnetic tape, drive device, 21 is rotation detector, 4-piece inverter, 5.9.14.15 is gate circuit, 18.19°20 is OR circuit, Fig. 2 2 is a timing chart illustrating the operation of the block diagram in FIG. 1. FIG.・、、、：、? +-'ノ

Claims (1)

[Claims] a detector that detects unrecorded parts between recorded songs;
A switch for specifying the song number, a memory circuit for storing in the specified order, an up/down counter for counting signals from the detector, and an output of the up/down counter and the content of the song number stored in the memory circuit. In a tape recorder that includes a comparator to be compared, a control circuit that drives a mechanical unit using the output of the comparator, and a magnetic tape drive device, the time from the time when a period of time has elapsed after the start of the performance of a song until the end of the performance of the song is determined. The first switch instructs to play the currently playing song again from the beginning only, or stops playing the currently playing song and instructs to select the next stored song. An automatic music selection device for a tape recorder, characterized in that a second switch is operated to select a song.