JPH0533477B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder having a music selection function.

Conventional configuration and its problems As a field of tape recorders, the user sings through a microphone along with the tape playback sound.
There is a device that performs a performance by mixing tape playback sound and microphone sound. This is commonly called a karaoke device, and hereinafter referred to as a karaoke device. This karaoke apparatus generally has a song selection function that selects the beginning of a desired song from among a plurality of songs recorded on a cassette tape. However, most of the conventional music selection functions simply locate the beginning of the desired song and wait until the selected song is the desired song. Since it was not known whether the song was correct or not until the performance started, some people realized that they had made a mistake in selecting the song after the performance had started, and had to try again, which could offend the singers.

Also, for some songs, the prelude (hereinafter referred to as intro) is difficult, so there is a desire to check the intro before singing, but in such cases, it is necessary to manually play and rewind each time. It was extremely troublesome to operate.

In response to this, it has been considered in the past to automatically perform the above operations by setting the intro playback time to a certain time (for example, about 20 seconds), but since the length of the intro varies depending on the song, it is difficult to sing the tape. It had drawbacks such as being rewound before the song started, and the intro state continuing for a long time even after the song started.

OBJECT OF THE INVENTION The present invention solves the above-mentioned problems of the conventional art, and provides a karaoke device in which a music selection operation is performed using an audio multiplex tape in which the accompaniment is recorded on the first channel and the singing is recorded on the second channel. To provide a tape recorder which can automatically check the intro of a desired song and reproduce the intro part up to the beginning of singing, no matter how long the intro is.

Structure of the Invention The present invention provides a tape recorder capable of reproducing signals of each channel of a tape in which accompaniment and singing signals are recorded in respective channels, and a signal detector that outputs an output corresponding to the presence or absence of a signal, and a signal detector that outputs an output corresponding to the presence or absence of a signal. and a signal switching means that transmits only the signal of the channel on the singing side to the signal detector in the intro playback state. By detecting the detection and further installing a delay means to rewind after a certain time delay, it is possible to check the intro and the beginning of the song for any music tape when selecting a song using an audio multiplex tape. Furthermore, by providing an intro stop command means that issues a stop command when the beginning of the song is detected in the intro rewind state, it is possible to perform a series of operations such as stopping at the beginning of the song after checking the intro/singing start. The company provides tape recorders.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention. 1 and 2 are first and second magnetic heads for detecting signals of the first and second channels, respectively; 3,
4 is a first and second regenerative amplifier that amplifies the signals detected by the first and second magnetic heads; 5 is a signal detector that outputs "L" and "H" depending on the presence or absence of a signal; 6 is a signal switching means for selecting the signals of the first and second regenerative amplifiers 3 and 4 and transmitting the selected signals to the signal detector 5;
7 is a switch for switching between normal song selection operation and intro operation (hereinafter referred to as intro switch).
It is.

Reference numeral 8 indicates an intro start means for giving a playback command to a mechanism control unit 13, which will be described later, when the intro switch 7 is in the ON state when the signal detector 5 detects the beginning of the song; An intro rewind command means detects the beginning of a channel signal and issues a rewind command; 10 receives a rewind command from the intro rewind command means and gives a rewind command to the mechanism control unit 13 after a delay of a certain time; 11 is an intro stop command means for detecting the beginning of the song by the signal detector 5 in the intro rewind state and giving a stop command to the mechanism control unit 13; 12 is a tape running device; 13 is an input terminal S, P , R is a mechanism control section that receives commands from the tape running device 12 to stop, play, and rewind the tape, respectively.

FIG. 2 is a specific circuit diagram of this embodiment, in which the intro starting means 8, the intro rewinding command means 9,
A delay means 10, an intro stop command means 11, and a mechanism control section 13 are incorporated into a microcomputer, 14 is a microcomputer, 15 is a power amplifier, and a signal is generated by the "H" output of the C output terminal of the microcomputer 14. The transistor of the switching means 6 is turned on and the second
The configuration is such that muting is applied to the path from the regenerative amplifier 4 to the signal detector 5 of the channel. Also, at this time, the path of the second channel signal to the power amplifier 15 is configured so that no muting is applied, and the signals of both channels are output from the speaker.

Figure 3 shows the recording situation of the audio multiplex tape, with the singing signal recorded on the first channel and the accompaniment signal recorded on the second channel. This is the signal section.

FIG. 4 is a flowchart showing part of the processing operation of the microcomputer 14. Based on this flowchart, the operation of each part when using the audio multiplex tape shown in FIG. 3 will be explained below. do.

First, when the beginning of the song in the accompaniment signal (Fig. ₃ The signals of both channels of 2 are now being transmitted. The signals recorded on the magnetic tape are detected by the first and second magnetic heads 1 and 2, amplified by the first and second reproducing amplifiers 3 and 4, mixed, and transmitted to the signal detector 5, where the signals are The detector 5 detects that it is the beginning of the song. At this time, intro switch 7
If it is OFF, the intro start means of the microcomputer 14 will determine this and proceed to step 4 in FIG.
At step 18 via steps 16 and 17, a stop command is given to the mechanism control unit 13, and the tape running device 12 is brought to a stop state.

Next, turn on the intro switch 7 and start the song.
When x ₁ is reached, the intro start means 8 determines this and goes through steps 16, 17, 19, and 20 to 21 and 22, where a playback command is given to the mechanism control section 13, the tape running device 12 is put into the playback state, and the intro starts. A play state is started. At this time, the intro rewind command means 9 memorizes the intro playback state, and the transistor of the signal switching means 6 is switched on.
In the ON state, the second channel signal that reaches the signal detector 5, that is, the accompaniment signal, is muted. At this time, since no muting is applied to the signal reaching the power amplifier 15, both the accompaniment and singing sounds are output from the speakers, and the user does not experience any audible disturbance.

Next, when the beginning of the singing signal (Fig. 3 x ₂ ) is reached in the intro playback state, only the signal of the channel on the singing side is transmitted to the signal detector 5, so it is the beginning of the singing signal. This can be detected, and the process reaches step 23 through steps 16, 17, 19, and 20, where the intro rewind command means 9 starts the delay means 10, sets a timer for a fixed time delay, and starts counting. In this state, when the count number of the timer becomes equal to the set number, steps 16, 24, and 25 are reached, and steps 26 to 28 are reached.A rewind command is given to the mechanism control unit 13, and the tape running device 12 is put into the rewind state, and the intro playback state is entered. The intro stop finger means 11 memorizes the intro rewind state, and the signal switching means 6 releases the muting of the accompaniment signal.

Next, when the beginning of the song (FIG. 3 x ₁ ) is reached again in the intro rewinding state, the signal detector 5 detects this and the intro stop command means 11 executes step 16.
The program reaches steps 18 and 29 via steps 17 and 19, giving a stop command to the mechanism control unit 13 to stop the tape running device 12 and cancel the intro rewind state.

As described above, according to this embodiment, when the intro playback state is entered using the audio multiplex tape, the signal path input to the signal detection circuit is switched, and only the signal of the singing side channel is input to the signal detection circuit. By detecting the beginning of the singing signal, the beginning of the singing can be reliably confirmed for any song with any intro length.

Effects of the Invention The present invention provides a tape recorder capable of reproducing signals of a plurality of channels, including a signal detector that emits an output corresponding to the presence or absence of a signal, and a signal that prevents the accompaniment side channel signal from being transmitted to the signal detector in the intro playback state. a switching means, an intro rewind command means for detecting the beginning of the signal of the singing channel by a signal detector in an intro playback state and issuing a rewind command, a delay means for delaying the rewind command for a certain period of time, By providing an intro stop command means that detects the beginning of a song with a signal detector and issues a stop command in the rewinding state, it can be used with music tapes of any song regardless of the length of the intro. It is now possible to play the intros up to and including the intros, which can be very effective as a karaoke song selection function.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a circuit diagram showing a specific configuration using a microcomputer, FIG. 3 is a state diagram showing the recording status of the audio multiplex tape, and FIG. 4 is a flowchart for explaining the operation. 1, 2...Magnetic heads for the first and second channels, 3, 4...Regenerative amplifiers for the first and second channels, 5...Signal detector, 6...Signal switching means,
7...Intro switch, 8...Intro start means, 9...Intro rewind command means, 10...Delay means, 11...Intro stop command means, 12...
... Tape running device, 13 ... Mechanism control section, 14 ... Microcomputer, 15 ...
…Power Amplifier.

Claims (1)

[Claims] 1. A tape recorder capable of reproducing the signals of each channel of a tape in which accompaniment and singing signals are recorded on each channel, which includes a signal detector that determines the presence or absence of a playback signal and outputs an output, and an accompaniment using the signal detector. It is configured to detect the beginning of the song on the signal and automatically switch to the playback state at the beginning of the intro, and in the playback state after the beginning, the signal of the accompaniment side channel is cut off and only the signal of the singing side channel is transmitted to the signal detector. an intro rewind command means for detecting the beginning of the signal of the singing channel by a signal detector in the playback state after the cue and issuing a rewind command; and a rewind command of the intro rewind command means. and an intro stop command means for detecting the beginning of a song with a signal detector and issuing a stop command in a rewinding state according to a command from the intro rewind command means. .