JPS59204095A - Musical sound pitch varying apparatus - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a musical tone pitch varying device, which checks the respective ranges of two different input audio signals, and changes the pitch of one input audio signal from these ranges to that of the other input range signal. It is an object of the present invention to provide a musical tone pitch variable device which can be varied and taken out in accordance with the pitch.

When a person sings, there is a limit to the range of sounds that can be uttered correctly, and this is generally referred to as the vocal range, and it differs from person to person. As there are individual differences in pitch range, for example, when singing along to accompaniment music from a commercially available karaoke tape, some people may be fine with the accompaniment music's range, while others may find it too high. There are various types of people, such as those who are too low and those who are too low.

Therefore, if the pitch of the accompaniment music from a karaoke cassette tape could be changed appropriately according to the user's individual vocal range without changing the tempo, the user would be able to accurately match the pitch of the accompaniment music. Being able to sing is advantageous as it allows you to make full use of your individual characteristics.

The present invention satisfies the requirement for manual writing, and one embodiment thereof will be described below with reference to the drawings.

FIG. 1 is a block system diagram of an embodiment of the musical pitch variable device according to the present invention, and FIG. 2 is a schematic front view of the operation board in FIG. 1. Before varying the pitch of the accompaniment music, the range of the accompaniment music and the user's range are checked. First, when checking fa Vj+ of accompaniment music, the user plays back the karaoke music set 1~tape and operates the input switch 2a provided on the operation board 1. The multiplexer 3 is operated by a signal from the mode determining section 12, and the input is switched to the terminal 4a side.

The playback sound of the karaoke cassette tape that enters the terminal 4a is filtered out by the low-pass filter 5, and unnecessary frequency components are removed.
It is supplied to the D converter 6. Initial settings (system initialization) are performed in the control unit @7 (Figure 3 (
A>Medium step a).

When an interrupt is issued every sampling period of the AD converter 6 (step u in FIG. 3B), the operation shown in FIG. AD conversion is performed in the AD converter 6 according to the conversion command (step V), and the digital signal is stored in the main memory 10.
is stored in

At this point, since the pitch variable switch 11, which will be described later, has not been operated yet (FIG. 3 (A>middle step b)), the mode determining unit 12 determines whether the input switch 2a has been operated (step h), and performs FFT calculation and sound. FF from the AD conversion results stored in the main memory 10 in the high analysis device 13
T calculation and pitch analysis are performed (steps i, J)
, the results are stored in the main memory 10. 11 Next, the highest pitch and lowest pitch determination section 14 determines the pitch-analyzed middle, highest, and lowest pitches (step k), and creates patterns for these two pitches. The data is created in the one pattern data determining section 15, and the video display
Via processor (VDP) 16; t-RAM
(V-RAM) 17 and written into a predetermined table. In this case, all the necessary parts of the music tape for J-Raoke are played back, and the highest and lowest notes of the music are checked.

A plurality of types of patterns to be displayed on the CRT 18 are stored in the V-RAM' 17, and a pattern to be displayed is selected in the VDP 16, and a composite video signal is created and supplied to the CRT 18.

For example, if the lowest note is A3 and the highest note is A5, a bar graph pattern pa as shown in the fourth diagram is displayed (step 2). Incidentally, the pitch names, scales, characters "human voice", "accompaniment", etc. from C1 to C7, for example, on the left end are displayed in advance based on data stored in the main memory 10 in advance.

Next, when the playback of cassette 1 to tape is stopped and the range of human voices is checked, the input switch 2b is operated to switch the input to the terminal 4b (step m). Here, the user presses the "C" button 191 among the eight check buttons 191 to 198 arranged in parallel on the operation board 1 corresponding to the note names from "C" to "C" one octave higher. Turn on the button 192 to say "do", then turn on the button 192 and say "shi", and then turn on the button in the same way and say the note name according to the pitch (step n
, 0). In this way, utter one after another within the range that can be uttered correctly, and press the octave up key 20 if you can utter the note name of button 198 or higher, and the octave down key 21 if you can utter the note name of button 191 or lower. Turn on each and speak. If this operation is not completed, end key 22
Turn on.

The uttered sound is subjected to FFT calculation (step p), pitch analyzed (step q), and stored in the main memory 10 in the same manner as in the above case. Once this is done (step r)
, in the key name determination section 23, check buttons 191-
The key (for example, F major) is determined from the pitch name of the turned-on button out of 198 and the analysis result of the pitch of the uttered pitch (step S), and a control signal corresponding to this key is sent to the pattern data determining section. 15 to create pattern data. As a result, the pattern "F major" is displayed on the upper left of the display surface of the CRT 18 (step t). At the same time, the highest and lowest tones uttered by the user are determined in the highest and lowest tones determination unit 14. For example, if the lowest tone is F2 and the highest tone is F, +, the fourth tone is displayed on the CRT 18.
A bar graph pattern pb as shown is displayed (step t).

When the accompaniment music range check and the user's range check are completed, the bit variable switch 11 of the operation board 1 is turned on and the karaoke cassette tape is played back. The mode determining unit 12 detects that the switch 11 is turned on (step b), and the human voice/accompaniment music range difference detection unit 25 detects the difference between the accompaniment music range and the user's range. In this case, it is determined that both are equal (step C), and the highest pitch of both is determined in the frequency shift amount determination and calculation section 26 and the lowest pitch determined in the lowest pitch determining section 14 (accompaniment music As, human voice F4). The amount of frequency shift is determined based on (step d). In this case, since the highest note of both is at an interval of 10 degrees, a shift amount corresponding to this interval is determined, and a frequency shift is performed based on this shift amount (i.e., the pitch of the accompaniment music is lowered by 10 degrees). ) (step e).

Next, in response to a command from the calculation command unit 9, the IFF (inverse FFT) calculation unit 27 demodulates frequency discrete data (step e), which is supplied to the DA converter 8 and converted into an analog signal (step w). )-, in this case, as shown in the time chart of FIG. 5, the input audio signal is AD converted and then subjected to FFT calculation 1 frequency shift in step e.

Each process of IFFT calculation and DA conversion is performed sequentially in step W, but while performing FFT calculation and frequency shift 1~, several AD conversions are performed, and furthermore, while performing FFT calculation, the following AD conversion and FFT calculation operation 1 number wave number shift i of the result of AD conversion of the above method are performed, and further DA
While performing the conversion, the following AI) conversion is also performed.

When the AD conversion and DA conversion for each standardization cycle are completed, the process returns (step x, y), and when these are completed (step X), initial settings for the AD conversion and DΔ conversion are performed (step Z), and the process returns. (Step V)
. The analog signal taken out from the DA converter 8 has unnecessary frequency components removed by a low-pass filter 28, is amplified by an amplifier 29, and is supplied to a speaker 30 after an IC to generate sound.

In this way, the pitch of the accompaniment music can be varied to match the pitch of the human voice range based on the difference between the human voice range and the accompaniment music range, so the singer can adjust the pitch of the accompaniment music to match the pitch of his or her 8th range. You can sing along with the music and it is easy to sing.

Steps 111 of steps c and d as described above are performed when the accompaniment music range is equal to the human voice range, and when the accompaniment music range is equal to the human voice range.
! This also applies when the musical range is narrower than the human voice range.

On the other hand, the highest and lowest notes of the human voice remain as shown in Figure 4, and the highest note of the accompaniment music is, for example, C6, and the lowest note is, for example, C3, so that the accompaniment music range is wider than the human voice range. If so, the human voice/accompaniment range difference detection section 25 determines this (step C), and moves to the next step [. Here, the singer looks at the case of the karaoke cassette tape, the musical score, etc., and checks the key of the accompaniment music. For example, if the key of the accompaniment music is C major, you should lower the key of the accompaniment music by 5 degrees or
All you have to do is raise the pitch or transpose it using one of the following methods.

Therefore, for example, 16 pitch selection switches 311 to 31 provided on the operation board 1 shown in the second figure
16, the switch 311 is turned on (step f).

The pitch selection switch 311 is for lowering the key by a fifth, and the pitch selection switch 3116 is for raising the key by a fifth.In between, there are 14 switches 312 to 3115, including a switch that can change the pitch of the pitch up or down. is provided. The frequency shift amount determination unit 26 detects that the switch 311 is turned on, and determines the frequency shift amount for lowering the key corresponding to the switch 311 by a fifth (
Step g). Similarly to the above case, IFFT calculation device 2
At step 7, C frequency shift 1~ is performed based on the above shift amount (that is, the bit of the accompaniment music is lowered by 5 degrees) (step e), and the sound is produced in the same manner as in the above case.

In this case, the key of the accompaniment music is transposed to a key that is easier for the singer to sing, so even if the accompaniment music range is wider than the human voice range and there are parts that are difficult to sing, the singer can take measures such as shifting the pitch by an appropriate octave. It is easier to sing along with accompaniment music played in a key unrelated to the key in which the singer is comfortable singing. Of course, it is not limited to this, and may be the singer's song itself (vocal part) sung along with accompaniment music.

Further, in the above embodiment, a method of checking the range using accompaniment music was explained, but the method is not limited to this, and checking the range and shifting the frequency using the vocal part can be done even if it is accompaniment music. good.

As described above, the musical tone pitch variable device according to the present invention converts an input audio signal into a digital signal, analyzes the frequency of this signal, determines the pitch, and uses the result of this pitch determination to determine the pitch of each separately inputted musical tone pitch variable device. The ranges of the two types of input audio signals are checked in advance, and the amount of frequency shift is determined from the ranges of each of the checked two types of input audio signals, and the frequency of one input audio signal is shifted L-L. , the shifted signal is converted to an analog signal and the sound is produced. For example, by playing a commercially available karaoke cassette tape and checking in advance the range of the accompaniment music and the range of the singer, it is possible to The pitch of the accompaniment music can be varied according to the singer's vocal range based on the vocal range of the singer.This allows the singer to sing along with the accompaniment music that matches the pitch of the vocal range that is easy for the singer to sing. Compared to conventional karaoke machines, where you had to play the karaoke cassette tape as it is and sing along to the pitch, it is easier to sing and allows you to make use of your individual characteristics to create musical effects. to the right.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block system diagrams of one embodiment of the apparatus of the present invention and one (schematic front view) of its operation board, and FIGS. 3(A) and 3(B) are flowcharts for explaining the operation of the apparatus of the present invention. Figures 1" and 4 are views of the CRT display screen, and Figure 5 is a timetable A7-1 for explaining the operation of the device of the present invention. 1... Operation board, 4a... Accompaniment music input terminal, 41]. ... human voice terminal, 6 ... AD converter, 8 ... I) A converter, 9 ... conversion and calculation command/digital signal output section, 10 ... main memory,
11...Pitch variable switch, 13...F F
14... Highest tone and lowest tone determining unit, 18... CRT, 191 to 198... Check button, 23... Temperature control determining unit, 25... Person Voice/accompaniment music range difference determination unit, 26... Frequency shift constant determination and performance unit, 27... IFFT calculation unit, 30...
Speaker, 311-3116... Pitch selection switch, Pa, Pb... Pattern. Patent applicant: Japan Victor Co., Ltd. Representative: Patent attorney: Tadahiko Ito
′\゛1. −

Claims (3)

[Claims] (1) An AD conversion means that converts an input sound angle signal into a digital signal, a frequency analysis means that frequency-analyzes the signal from the AD conversion means to determine the pitch, and a Range checking means for checking in advance the ranges of two different input audio signals entered separately based on the high judgment results; Frequency shift amount determining means for determining a frequency shift value from each sound range; a shift h determined by the frequency shift determining means; a frequency shift means for shifting the frequency of one input audio signal; A musical tone pitch varying device comprising means for converting the signal shifted by the shifting means into an analog signal and generating sound. (2) The frequency shift amount determining means is a means for determining the frequency shift amount from the highest notes in the ranges of the two types of input audio signals respectively checked by the range checking means. A musical tone pitch variable device according to claim 1. (3) The frequency shift amount determining means is means for determining an arbitrary frequency shift amount by external operation when the range of one input audio signal to be frequency shifted is wider than the range of the other input audio signal. A musical tone bit varying device according to claim 1, characterized in that: