JP2524056Y2 - Pitch converter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention converts the pitch of an input voice signal by converting the pitch of a voice signal input from a microphone or the like, and thus the input voice is a pitch. And a pitch converter capable of outputting different sounds.

[Summary of Invention] The pitch converter of the present invention arranges an operation unit for determining a conversion rate at a position where the user can easily operate it while holding it. The determination can be made by a combination of the ON / OFF state of the key, and the operability is remarkably improved.

[Prior Art] A pitch converter capable of converting the pitch of an input signal and outputting the converted signal has been widely known and has been applied in various fields. 2. Description of the Related Art There is known a pitch converter that changes the pitch of a voice input from a microphone and outputs the pitch from a speaker.

As a pitch converter for such a game, for example, as shown in FIG.
Power switch 4, volume 5, conversion rate operation unit 6a
(+ Key) and 6b (-key). Each time the conversion rate operation unit 6a is pressed, the voice pitch changes, for example, one note at a time, to a higher pitch, and each time the operation unit 6b is pressed, the voice pitch changes to a lower pitch. That is, the operation of pressing the + key 6a a desired number of times to increase the pitch of the output voice, and pressing the − key 6b a desired number of times to lower the pitch of the output voice is performed.

In some of such devices, a numerical value input unit is provided as an operation unit, and an output pitch is set based on the input numerical value.

[Problems to be Solved by the Invention] However, such a pitch converter has a problem that when setting a desired voice pitch, it takes a long time to perform a setting operation, and the output voice is continuously changed. That operation is also difficult. In particular, it is also difficult for the user to operate to obtain a desired voice pitch while continuing to talk to the microphone 2.

[Means for Solving the Problems] The present invention has been made in view of such problems, and in order to provide a pitch converter with greatly improved operability, turning on an operation key in an operation unit has been proposed. The conversion rate is determined by a combination of the ON / OFF states, and the operation keys are arranged at a position where the operation key can be easily operated even during use, that is, near the holding unit.

[Action] Operation keys are arranged so that they can be easily operated during use.
By determining the conversion rate by a combination of the ON / OFF states of the operation keys, the conversion rate can be operated in the same manner as the operation of the musical scale of a musical instrument such as a trumpet or a recorder.

Embodiment First, pitch conversion processing of a pitch converter will be described.

FIG. 1 is a block diagram of a pitch conversion processing circuit.
Is a microphone unit, 11 and 15 are amplification circuits, 12 is an A / D converter, 13 is a pitch conversion processing unit, 14 is a D / A converter, and 16 is a speaker. The pitch conversion processing unit 13 is provided with a writable / readable memory 13A.
When certain data is input, the data is rewritten and stored in order from the oldest data, and is generally called a ring memory.

Reference numeral 17 denotes a key operation unit for setting a conversion rate by a user using operation keys as described later, reference numeral 18 denotes a control unit (CPU) for controlling a pitch conversion operation based on the key operation, and reference numeral 19 denotes a sampling clock f _S1 and a write clock. f _W that generates f _W
Generating unit, 20 is a f _R generator for generating a read clock f _R (and f _S2).

In such a circuit configuration, in particular, to have not a group on a signal from the key operation unit 17, CPU 18 controls the f _R generator 20, the pitch of the input voice signal by changing the frequency of the read clock f _R The conversion is performed.

 First, the case of converting to a lower pitch will be described.

For example, as shown in FIG.
When the audio signals S ₁ to 10 is input, it is converted into a digital signal at the timing of the sampling clock f _S1 (= f _W), data is stored in the ring memory 13A to have not a group with the write clock f _W.

Data is read out almost simultaneously with the storage operation by a time-division operation. That is, the data is read out and D / A converted by the read clock f _{R (L)} generated at a frequency lower than the write clock f _W to generate a low sound as shown in _{SO (L).} The converted audio signal is output via the amplifier circuit 15 and the speaker 16.

When the input voice is converted into a higher pitch, as shown in FIG. 2 (b), the read clock f _{R (H)} generated at a frequency higher than the write clock f _W generates a signal from the ring memory 13A. By reading the data and performing D / A conversion, a sound converted to a high-frequency range as shown in S _{O (H)} can be obtained.

In other words, it is possible to control the f _R generator 20 by CPU 18, the write clock frequency, by generating a difference in desired amounts with the read clock frequency, to obtain a simple audio is changed by the desired scale partial .
It is also possible to change the sampling frequency and the write clock frequency by controlling the f _W generation unit 19.

In such a pitch converter, the amount of change in the pitch (conversion rate) is set by the user in the key operation section 17, and the clock frequency is controlled by the CPU 18 based on the set amount as described above. Things.

The pitch converter of the present invention has a great feature in the key operation unit 17, and is capable of setting a conversion rate by a combination pattern of on / off states of a plurality of operation keys. Next, various embodiments will be described.

FIG. 3 shows a pitch converter in the form of a trumpet, in which operation keys K are provided so that the conversion rate can be set in a manner similar to that of playing a trumpet.
That is, the user holds the pitch converter and holds the microphone unit.
By operating the operation key K at the same time as speaking to the MC, a sound converted by a desired pitch amount can be output from the speaker unit SP. The operation key K
Is set to correspond to the fingering of the musical scale operation of the trumpet (for example, when the fingering is “do”, the conversion rate is set to zero, and the output is raised by one pitch by “re”). Like voice).

Alternatively, each operation key K may be formed by a variable volume (slide volume), and the conversion rate may be determined by a combination of a stroke amount of each operation key K, that is, a depression amount of each operation key by a finger. .

FIG. 4 shows the pitch converter in the form of a recorder, and FIG. 5 shows the pitch converter in the form of a saxophone, each of which enjoys the pitch conversion of the sound in the same manner as the performance of each musical instrument. Can be.

Further, FIG. 6 shows a hand microphone-like configuration in which key operations can be performed while holding the microphone. In this case as well, the conversion rate may correspond to the fingering like a recorder.

As described above, according to the present invention, for example, it is possible to enjoy the pitch conversion of voice in a style of playing a musical instrument, and the fingering of the operation key of the conversion rate corresponds to the musical scale fingering, or By setting a proper fingering, the operability is improved, and it is useful as a game device. In particular, not only can the conversion rate be changed easily during use, but also the conversion rate can be changed stepwise.

In addition, although the form based on the form of various musical instruments was mentioned as the form of the above-mentioned embodiment, it is not always necessary to make the shape similar to a conventionally existing musical instrument, and as long as almost the same use form can be achieved. Is not limited in form. Also, the fingering for setting the conversion rate does not necessarily need to match the musical instrument.

By the way, a reproducing device such as a cassette tape is further incorporated in such a pitch converter so that the pitch of reproduced sound from the cassette can be converted, so that the pitch converter can be used for portable karaoke and the like in which the pitch (key) can be adjusted. can do.

[Effects of the Invention] As described above, the pitch converter of the present invention allows the conversion rate to be determined in accordance with the combination of the on / off states of the plurality of operation keys. Since the converter is arranged in the vicinity of the holding portion of the converter, the operability is greatly improved, and there is an effect that, for example, the voice pitch conversion can be enjoyed in a style and an operation mode such as playing a musical instrument. Therefore, there is also an effect that the pitch conversion rate can be freely changed during use.

[Brief description of the drawings]

FIG. 1 is a block diagram of a circuit system of a pitch converter, and FIGS. 2 (a) and 2 (b) are waveform diagrams for explaining pitch conversion processing.
3 to 6 are explanatory views showing various embodiments of the present invention,
FIG. 7 is an explanatory diagram showing an example of a conventional pitch converter. 12 is an A / D converter, 13 is a pitch conversion processing unit, 13A is a ring memory, 14 is a D / A converter, 17 is a key operation unit, 18 is a CPU, 19 is
f _W generator, 20 f _R generator, MC microphone unit, K, K _V operation keys, SP is a speaker unit.

Claims (1)

(57) [Scope of request for utility model registration] 1. A pitch converter capable of pitch-converting an input voice signal based on a conversion rate specified by an operation unit and outputting a voice having a pitch different from that of the input voice signal. In the unit, the conversion rate is determined in accordance with the combination of the ON / OFF states of the plurality of operation keys, and the operation keys are arranged near the holding unit of the pitch converter, thereby enabling the user to change the conversion rate. A pitch converter characterized in that the conversion rate can be freely set according to the finger movement pattern.