JP2787043B2 - Self-diagnosis mechanism of karaoke terminal sound source - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke apparatus that reproduces music that has been digitized as computer information and displays lyrics, and more particularly to a karaoke terminal installed in a karaoke terminal. The present invention relates to an apparatus for determining an operation.

[Background of the Invention]

The present invention is based on a completely new technique of converting both karaoke music information and lyric information into binary digital information and reproducing or displaying the digital information. The applicant has disclosed a series of inventions related to these techniques (for example, Japanese Patent Application No. 63-308503, Japanese Patent Application No. 1-30).
No. 86, Japanese Patent Application No. 1-1298, etc.).

In this case, the music information encoded into the information on time and the performance information on the tone and pitch must be converted into an analog audio signal for music reproduction and amplified and output. In the karaoke terminal intended by the applicant, as a mechanism for achieving this function, an electronic sound source such as a synthesizer accommodating a large number of sampling waveforms is used, and a plurality of these sampling waveforms are selected and synthesized and output. It is intended to compose music with a desired tone.

By the way, when playing a music tape or record that has been used in the past, all the processes from pickup of information to output are performed by analog processing, but if some functions of the device break down, It is easy to identify a malfunction such as no sound or remarkably deteriorated sound quality, and it is relatively easy to find the cause and deal with it. However, the karaoke terminal applied to the present invention outputs a plurality of sampling waveforms at the same time, combines them, and amplifies them with an analog amplifier. Even if you do
Some waveforms, that is, only timbres are not output, and other timbres are output as before. Therefore, as music generated from the speaker, for example, the result is that the accompaniment portion of the guitar is not reproduced at all, while music that does not use the tone of the guitar is reproduced unnaturally and accurately. There is a problem that it is difficult to identify a malfunction.

An object of the present invention is to provide a self-diagnosis mechanism capable of checking the operation of a sound source at any time by simply mounting a simple mechanism.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention relates to a karaoke terminal device including a sound source (2), an error indicator (LED), and a main board (1). Main board (1) having a waveform and M sound channels capable of independently outputting a sampling waveform
Output the sound source (2) sequentially and individually to all N sampling waveforms for all M sound channels, determine whether the output value of the sound source (2) is 0, and output When the value is 0, means for turning on an error indicator (LED) is used.

[Action]

The sound source has a function of accommodating a plurality of N sampling waveforms and generating a desired tone by selecting an arbitrary waveform.
For this purpose, all the stored sampling waveforms need to function, and in order to check this, it is determined whether or not there is a full waveform output level. The sound source has a plurality of stages, that is, a maximum of M sounding channels capable of simultaneously generating sounds. Perform output. As a result, the function of determining the normal function of the sound source is performed.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram schematically showing the mechanism of the present invention.
1 is a main board of a karaoke terminal equipped with a CPU for controlling the entire apparatus, a modem for connecting to a host computer, an interface for connecting to a storage medium, and a sequencer, and 2 is a sound source containing a large number of sampling waveforms. 3, an A / D converter for judging whether or not the sound source 2 is producing sound; 4, a changeover switch for preventing a signal from being output to a later-stage amplifier circuit or the like during the test sounding of the sound source 2; a is a high / low 1-bit output signal of the A / D converter 3 to the main board 1, b is a test signal for controlling the changeover switch 4 under test, c
Is an error output for lighting a light emitting diode or the like when the sound source 2 has a malfunction. Here, the sound source 2 is N
And a stage containing M sampling channels and containing M channels. A step means the number of pitches that can be pronounced at one time.
Chords can be composed of sounds. Further, each stage can individually select an arbitrary waveform from N sampling waveforms.

Now, in the karaoke terminal, the CPU mounted on the main board 1 analyzes music information specified by a keyboard or the like,
The tone generator 2 is controlled serially by the sequencer, and it is specified for each stage which of the N sampling waveforms of the tone generator 2 is to be sounded, at what pitch, at what intensity, and for how long. Is done. In this case, since the control regarding the time is not directly related to the presence or absence of the failure of the sound source 2, the information to be diagnosed as the sound source 2 includes the propriety of each sampling waveform itself, the propriety of the address connection between each stage and the sampling waveform, the strength of sound generation. That is justified. Therefore, if these are all diagnosed, it is possible to determine whether or not the sound source 2 is malfunctioning. For this reason, in this embodiment, all sampling waveforms are diagnosed for each stage with a fixed sound intensity. In this way, the presence or absence of all sampling waveform outputs, the appropriateness of the address connection with each stage, and the tone generation level are checked all over. This procedure will be described with reference to the flowchart shown in FIG.

In this embodiment, the number of sampling waveforms is 128,
The number of steps is 16.

In the figure, when the power of the karaoke terminal is turned on or the reset switch is pressed, the process is started. First, it is confirmed that the LED for error display is turned off, then the test signal b is output, and the changeover switch is opened. Next, the stage number n and the sampling waveform number m are set to the initial value 0 to start the test,
Subsequently, the diagnosis is started. When the diagnosis is started, for the first stage of the number assigned to each stage, the first of the waveform numbers m assigned to each sampling waveform is selected, and an analog waveform is output with a constant sounding intensity. Next, this output is input to the A / D converter. If the input is 0, it is determined that there is no analog output of the sampling waveform, a low output is performed to the main board 1, and the test is completed after turning on the LED. . On the other hand, when there is an output, the output of the sampling waveform is temporarily stopped, the sampling waveform number is advanced by one, and the next waveform is checked. When all the waveforms in one stage are checked in this way, the check is repeated in the same manner in the next stage, and this loop is performed until the last stage.
If the LED does not light up in this way, it can be determined that the sound source and the address are normal.

If the error timing is numerically displayed instead of turning on the LED, it is possible to identify which sampling waveform has the above or whether the address is not connected.

〔The invention's effect〕

If the configuration of the present invention is adopted, it is checked whether or not the sampling waveform contained in the sound source is output for all of the stages capable of simultaneously generating the sound source. Can be. Therefore, if this diagnosis is performed before driving the karaoke terminal, the state of the sound source can be accurately known in advance, and it is possible to prevent a singer from being confused during use.

Furthermore, it has been difficult in the past to identify which part of the terminal had a failure, even if the music played was bad. Can be reliably determined, which can contribute to the maintenance and management of the entire terminal.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of the mechanism of the present invention, and FIG. 2 is a flowchart showing the operation of the mechanism of the present invention. In the drawing, 1... Main board, 2... Sound source, 3... A / D converter, 4... Changeover switch, a... Input signal, b.
Test signal, c ... Error output.

Claims (1)

(57) [Claims] 1. A sound source (2), an error indicator (LED),
A karaoke terminal device comprising a main board (1), wherein the sound source (2) has a plurality of N sampling waveforms and M sounding channels capable of outputting sampling waveforms independently. Output the sound source (2) sequentially and individually to all N sampling waveforms for all M sound channels, determine whether the output value of the sound source (2) is 0, and output When the value is 0, an error indicator (LE
Turn on D) Karaoke terminal sound source.