JPS6389897A - Tuner with sound judgement - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tuner that performs an auditory frequency deviation of a tuning determining means in a tuner used for tuning the sound of a musical instrument.

[Summary of the invention]

The present invention controls a signal for emitting a sound according to the difference in frequency deviation by a sound judgment control part, and includes an output part for outputting the signal of the sound judgment control part to the outside, This makes it possible to judge tuning by hearing by emitting a sound, for example, a high-pitched sound when the pitch is high, and conversely a low-pitched sound when the pitch is low, or a sound with a different sound pressure or timbre.

[Conventional technology]

Conventional tuning machines manually input the electric signal of the sound to be tuned through an external input circuit to a waveform shaping circuit, which shapes the waveform to make it easier to process the signal. The signal and frequency are compared, and the signal corresponding to the frequency deviation is converted to a DC voltage via a frequency-voltage conversion circuit, and the VU
A method of displaying frequency deviation using a meter is known. Furthermore, instead of the VU meter, there is an LED meter using a light emitting diode element. The LED meter can be displayed by the LED meter through an arithmetic conversion circuit in which LED elements arranged in parallel on an arc are installed and the signal corresponding to the frequency deviation is displayed by emitting light similar to the operation of the VU meter. It was known.

Further, there has been known a tuner that generates a fixed reference frequency from a frequency divider that divides a sound or a reference clock to emit a fixed reference sound, and generates the reference sound.

[Problem that the invention seeks to solve]

Conventional tuners have visual indications, so tuning cannot be determined unless the tuner's display is within the visible range.
VU meters are difficult to read by displaying errors due to differences in posture and by comparing the meter dial with the meter pointer. There was a drawback.

Further, in the case of a tuning method that uses beats between the pronunciation of the reference tone and the tuned tone, there are drawbacks such as it is difficult for beginners in particular to understand the feeling of the beat of the sound, and they are unable to notice subtle pitch deviations at all.

[Means for solving problems]

In order to solve the above problems, the present invention extracts the pitch of a to-be-tuned tone, performs a comparison operation using a reference signal for calculating the deviation between the extracted pitch and the pitch, and calculates the deviation from the reference signal. and a sound determination control section that receives a signal for the deviation calculated by the pitch extraction calculation section and controls a signal for performing a tuning determination for the deviation due to sound, The configuration includes an output section for outputting a signal from the sound determination control section.

[Effect]

When a musical instrument or the like is tuned with the tuner configured as described above, the sound judgment control section receives a signal corresponding to the frequency deviation of the tuned sound calculated by the pitch extraction calculation section, and adjusts to the difference in deviation. Controls a sound signal (for example, a high-pitched sound when the pitch is high, a low-pitched sound when the pitch is low, or a sound whose sound pressure and timbre differ depending on the pitch), and the output signal of the sound judgment control section. The output section receives the input signal and emits a sound corresponding to the difference in pitch of the tuned tone, making it possible to judge tuning by hearing.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of a tuner with sound determination according to the present invention. Reference numeral 1 in FIG. 1 denotes an input section through which a tuned tone is input. A waveform shaping section 2 connected to the output of the input section 1 shapes the waveform of the input signal to facilitate signal processing. Receiving the output signal of the waveform shaping section 2 and the output signal of the reference signal generation section 4 that generates the clock signal, the pitch of the tuned tone is extracted, and the extracted pitch and the frequency serving as a reference for calculating the deviation are received. It has a pitch extraction calculation unit 3 that performs a comparison calculation based on a reference frequency (referred to as a reference frequency) and calculates a deviation from the reference frequency, and outputs the output via a sound judgment control unit 5 connected to the output of the pitch extraction calculation unit 3. Tuning determination is made by sound from section 6.

FIG. 2 is a circuit block diagram of the tuner with sound determination, in which the pitch extraction calculation unit 3 is explained in detail based on the block diagram shown in FIG.

In Fig. 2, 1 is an input section, which includes a waveform shaping section 2 that converts the measured signal A, which is a tuned sound into an electrical signal, into a pulse signal B, and a waveform shaping section 2 that receives the pulse signal B and receives each rising interval of the pulse signal B. a pulse control circuit 8 for counting in the counter 7; and a pitch extraction circuit 9 for extracting the pitch of the pulse signal B from the count value signal of the pulse control circuit 8, and generates a count clock signal for the counter 7. a storage circuit 11 that stores a reference table for calculating octave/scale names and deviation values based on fixed pitches; Octave/scale name search circuit 1 that calculates the octave/scale name of pulse signal B based on the signal
2, a cent value calculation circuit 12 for receiving the signal from the octave/scale name search circuit 12 and calculating a deviation value based on the signal from the storage circuit 11; Oscillator 1 that generates a signal for
3, and a sound determination control section 5 which receives the signal from the oscillator 13, selects a sound signal according to the difference in the deviation value signal of the cent value calculation circuit 12, and supplies the signal to the output section 6.

The waveform shaping section 2 converts the output signal waveform A of the input section 1 shown in FIG. 3 into a pulse signal waveform B, for example. The pulse control circuit 8 controls each rise interval of the pulse signal B to be counted in a carantuff, and outputs each rise timing to the pitch extraction circuit 9. The pitch extraction circuit 9 extracts the pitch of the pulse signal B from the count value t of each rising interval counted by the counter 7: L2+lff...

Extract as the calculated value.

The storage circuit 11 stores a count value corresponding to each octave of a fixed reference pitch, a count value for each scale name corresponding to one octave, and a count value per cent deviation. The octave/scale name search circuit 10 extracts the pitch count value extracted from the pitch extraction circuit 9, the count value corresponding to each octave of the fixed reference pitch from the memory circuit 11, and each scale name corresponding to one octave. After each count value is received, comparison calculations are performed to calculate the octave/scale name of the signal under measurement. Further, a calculation signal of the calculated octave scale name is output to the cent value calculation circuit 12.

The cent value arithmetic circuit 12 is connected to the memory circuit 11 to
The zero oscillator 13 calculates the deviation value by calculating the count value of the octave/scale name calculated by receiving the stored data of the count value per cent deviation, and outputs the signal to the sound judgment control section 5. The signal receiver generates a sound signal for making it possible to judge tuning by hearing the frequency deviation, and outputs it to the sound judgment control section 5. The sound determination control unit 5 generates a sound corresponding to the difference in the deviation value signal of the cent value calculation circuit 12 from the signal of the oscillator 13 (for example, if the pitch is high, the pitch is high; if the pitch is low, the pitch is low). It selects and controls a signal of a sound or a sound whose tuning can be determined by hearing, such as a sound whose sound pressure or timbre differs due to a difference in pitch height or low pitch, and outputs the signal to the output section 6. The output section 6 receives the signal from the sound judgment control section 5 and outputs to the outside a sound corresponding to the difference in frequency deviation of the tones to be tuned, thereby making it possible to judge the tuning by hearing.

〔Effect of the invention〕

As described above, according to the present invention, since the tuning judgment of the tuner is made audible, it is possible to judge the tuning even though the display section is outside the visual range, and it is possible to judge the tuning even if the display part is outside the visual range. Because it generates a sound signal, it has the effect of allowing even subtle pitch deviations to be clearly determined by hearing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a tuner with sound determination according to the present invention, FIG. 2 is a circuit block diagram of the tuner with sound determination, and FIG.
The figure is a timing chart diagram of input signal A and output signal B of the waveform shaping section. 1... Input section 2... Waveform shaping section 3... Pitch extraction calculation section 4... Reference signal generation section 5... Sound judgment control section 6... Output section 7... Counter 8. ... Pulse control circuit 9 ... Pitch extraction circuit 10 ... Octave/scale name search circuit 11 ... Memory circuit 12 ... Cent value calculation circuit 13 ... Oscillator or higher

Claims (1)

[Claims] an input section for inputting musical instrument sounds or electrical signals, a waveform shaping section for shaping the input signal, a reference signal generation section, and an output signal of the reference signal generation section and the waveform shaping section for the waveform shaping section. a pitch extraction calculation section for receiving the output signal, extracting the pitch from the waveform-shaped output signal, determining the deviation between the extracted pitch and a fixed reference frequency, and calculating the pitch of the external input signal; a sound judgment control section that receives the output signal of the pitch extraction calculation section and controls a signal for producing sound according to the difference in frequency deviation; and a sound judgment control section that is connected to the output of the sound judgment control section and outputs a signal for tuning judgment based on sound. A tuner consisting of an output section.