JPH0532878Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a tuner.

[Summary of the idea]

The present invention relates to a tuner, and the present invention provides an input signal display section that lights up an LED, etc. with a rectangular wave signal that is amplified by a buffer amplifier section and obtained via a waveform shaping section while a tuning signal is being input. This tuner reliably indicates that the signal from the musical instrument is being input.

[Conventional technology]

Conventional musical instrument tuners can display the frequency deviation with respect to the reference frequency to be tuned, but no tuner has a function to display whether a signal is input to the tuner.

[The problem that the idea aims to solve]

When tuning an instrument using a tuner, if the tuned tone of the instrument deviates significantly from the standard tone,
There are cases where the tuner does not display the frequency deviation at that time. Particularly in the case of stringed instruments, the tuner does not display the frequency deviation, which has the disadvantage of over-winding the strings and causing them to break.

[Means and actions for solving the problem]

In order to solve the above problems, in the present invention, even when the input sound from the musical instrument is significantly deviated and the tuner does not respond, the tuning signal is amplified by the buffer amplifier section and output from the waveform shaping section. By adding an input signal display section driven by a rectangular wave, it is possible to display that a signal is being input to the tuner and that it is operating normally.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.
The drawing is an overall block diagram of an embodiment of the tuner of the present invention.

1 is a signal input section, 2 is a buffer amplifier section, 3 is a waveform shaping section, 4 is a pitch extraction section, 5 is a cent deviation calculation section, 6 is a meter drive signal conversion section, 7 is a meter, and 8 is an input signal display section. .

Next, the operation of the tuner implemented in the present invention will be explained. A signal transmitted by wire or in the air and input through a signal input section 1 consisting of a connector and a microphone is amplified to an appropriate size by a buffer amplifier section 2. Then, the waveform shaping section 3 shapes the signal into a rectangular wave, and the pitch extraction section 4 determines (extracts) which reference frequency it is close to.
Next, the cent deviation calculation unit 5 calculates the deviation from the reference frequency, and the meter drive signal conversion unit 6 converts the result into a direct current, and the meter 7 displays the cent deviation.

The input signal display section 8 is configured to cause the LED 9 to emit light via the current limiting resistor 8 based on the rectangular wave signal output from the waveform shaping section 3.

Here, if the instrument's tuning signal is not input,
Since there is no signal amplified by the buffer amplifier section 2, no rectangular wave is output to the waveform shaping section 3.
LED9 does not light up. However, when a tuning signal is input, the waveform shaping section 3 outputs a rectangular wave according to the frequency of the tuning signal, and the input signal display section 8
LED9 lights up.

In this embodiment, an LED is used as the display, but a light bulb may be used, or the output signal from the waveform shaping section may be smoothed through an integrating circuit, and a driver circuit may drive a solenoid to move an indicator board. It is also possible to display the signal input status.

[Effect of idea]

By implementing the present invention, the following effects can be obtained.

(1) If a tuning sound that is significantly deviated is input to the tuner,
Even if the tuner does not respond, it is possible to determine whether the audio or musical tone signal is being input normally or not by checking the display via indicators such as LEDs. This allows the person to check whether the tuner is working properly, especially when tuning a stringed instrument, etc., by checking the operating condition of the tuner while tuning, to prevent strings from overwinding, etc. Cutting accidents etc. can be prevented.

(2) The above effects can be expected by adding a simple circuit, and the circuit is relatively practical.

[Brief explanation of the drawing]

The drawing is an explanatory diagram of the operation of the tuner implemented in the present invention. 1...Signal input section, 2...Buffer amplifier section,
3...Waveform shaping section, 4...Pitch extraction section, 5...
cent deviation calculation section, 6... meter drive signal conversion section, 7... meter, 8... input signal display section.

Claims (1)

[Scope of utility model registration request] A tuner that detects the vibration frequency of an instrument as a tuning signal and displays its frequency deviation includes a buffer amplifier section that amplifies the tuning signal input to the tuner, and a waveform shaping of the output signal of this buffer amplifier section into a rectangular wave. It has a waveform shaping section that performs processing, and by adding an input signal display section that shows that the musical instrument's tuning signal is input using the output rectangular wave from this waveform shaping section, it is possible to eliminate a significant deviation from the reference tone. Even when the vibration frequency is input and the frequency deviation is not displayed, the presence or absence of signal input is displayed to ensure that the tuning sound is input to the tuning device. vessel.