JPS62157097A - Chord accompanying 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 [Technical Field of the Invention] The present invention relates to a chord accompaniment device for an electronic musical instrument.

[Prior Art] Conventionally, chord accompaniment devices that rotate accompaniment chords and emit sounds are known.
No. 53821), which selects and inverts the lowest note among the constituent notes of a basic chord when the root note of the chord is the lowest note.

[Prior art and its problems] However, in such a thing, for example, if we consider the first inversion chord of C major and B major, the constituent tones are Ea, Ga, Cs and [)51°F51. B
6, and there was a considerable deviation in the range, which was unnatural.

[Purpose of the invention j This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a chord accompaniment device that can obtain natural chords without deviation in the range of each inverted chord. There is a particular thing.

[Key Points of XA Ming] In order to achieve the above-mentioned purpose, this invention stores a plurality of accompaniment chords in a form that falls within a certain range, and stores each accompaniment chord in a form that falls within a certain range. The main point is that arithmetic processing of chord rotations is performed.

Configuration of Example] An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 shows the overall circuit of the chord accompaniment device. In the figure, 1 is a key operation section, and this key operation section 1 includes: 52
As shown in the figure, in addition to the code key 2, the first rotation key 3,
A second rotation key 4 is provided.

Code key 2 is a key that specifies the type of code.

Yes, major (ma j o r) and minor (mi
nor) (marked r m 4 in Figure 2)
It is possible to specify two groups of codes. The code specified by this code key 2 is from B3 to B3 as shown in Figure 3.
Each component note falls within the range of one octave of B4, and the C-DI series is in its basic form, and the E-G series is inverted by one level.

The G1-B series has a shape in which it has been rotated two positions downward.

The first rotation key 3 is a key that rotates the chord specified by the chord key 2 up one level, and the chord in this case is within the range of one octave from Dal to D5I as shown in FIG. Each constituent sound is accommodated, and C-D
-The system is turned up by one position, the ENG system is the basic form, 01
~The B series has a shape inverted by one position downward.

The second rotation key 4 is a key that rotates the chord specified by the chord key 2 one level higher, and in this case, the chord is within the range of one octave from 04 to G5 as shown in FIG. Each component note is arranged to fit in the C-
The DI system has two turned upwards, the E-G system has one turned upward, and the 01 to B systems have the basic form.

The operation of the code key 2 is detected by the operation key detection circuit 5, and code type data corresponding to the operation code key 2 is set in the code type register 6 and provided to the pattern ROM 7. In this pattern ROM 7, as shown in FIG. 6, the pitch difference between each constituent note of a chord is expressed. The constituent note pattern data of the chord is stored. "0" indicates the lowest note of the constituent notes of the chord in FIG. 3, and each numerical value indicates the interval difference from the constituent note one below in semitone units, and each number is made up of five numerical values. Of these five numbers, the lower three constitute the basic code in Figure 3, the middle three constitute the chord turned up one level in Figure 4, and the upper three constitute the chord in Figure 5. A chord inverted two places is constructed.

From this pattern ROM7, the code type register 6
According to code type data from. Constituent sound pattern data consisting of five numerical values is read out and given to the arithmetic circuit 8. In addition, the lowest note (not the root note) of each chord shown in FIG. and is applied to the arithmetic circuit 8. Further, the operation of the first rotation key 3 or the second rotation key 4 is also detected by the operation key detection circuit 5, and a corresponding first rotation signal F1 or second rotation signal F2 is provided to the arithmetic circuit 8.

In the arithmetic circuit 8, the pitch data of each constituent note of the chord is calculated from the basic pitch data based on the lowest note pitch data given from the lowest note register 9 and the constituent note pattern data from the pattern ROM 7. Five pieces of pitch data up to two inversions are temporarily created, and depending on the presence or absence of the first inversion signal F1 and second inversion signal F2 from the operation key detection circuit 5, any three pitch data are selected, and the pitch data is stored in the scale register 10.
is set to The pitch data entered in the scale register 10 is applied to a musical tone generating circuit 11 to generate respective musical tones, which are output as chords from a speaker 13 via an amplifier 12.

[Example operation J Next, the operation of this embodiment will be described.

Now, press the first turn key 3. Do not operate the second rotation key 4,
It is assumed that code key 2 is operated.

Then, the lowest tone pitch data C4 of this coat C is set in the lowest pitch register 9 from the operation key detection circuit 5, and the chord data of C is sent from the operation key detection circuit 5 to the pattern ROM 7 via the chord type register 6. The constituent sound pattern data of "C14, 3, 5, 4" in FIG. The arithmetic circuit 8 receives the lowest pitch data C4 from the lowest pitch register 9 and "0, 4.3.5.4" from the pattern ROM 7.
” Cd based on the pattern data.

Pitch data of each of the five constituent sounds Ea, Ga, Cs, and Es is created, and the first rotation signal F1. Since the second rotation signal F2 is not applied, the lower three pitch data of C4, Ea, and Ga are selected and set in the scale register 10. As a result, Ca, E4.
Three pieces of musical tone data of Ga are created by a musical tone generation circuit 11, and outputted as a chord from a speaker 13 via an amplifier 12.

Next, it is assumed that the code key 2 of G is operated. Then, this time, the lowest pitch data of D4 and "0" are sent to the calculation circuit 8.
．． Given the constituent sound pattern data of 5.4 and 3.5J, pitch data of each of the five constituent sounds of D4, G4, Ba, Ds, and Gs is created.
, Ba are selected and played as a chord (this chord of 84, Da and Ga is the chord of G major turned down one step).Next, the chord key 2 of A is played. It is assumed that the operation was performed. Then, this time, the lowest pitch data of C- and "
0.3.5.4,3'' constituent sound pattern data were obtained, Ca', Ea, AA.

Cs1. Pitch data for each of the five constituent notes of Es is created, and the lower three, Ca', Es, and AJ, are selected and emitted as a chord. These C41, Ea,
The Aa chord is an A major chord inverted two places below.

Thus, the code specified only by code key 2 is B
It falls within the one octave range from 3 to B4, and the range of each chord is almost the same. This is the same for the minor (m) chord.

Also, if you operate the first turn key 3 and operate the code key 2 for C, Ca, Ea, Ga will be activated, similar to the operation of only the code key 2 for C described above.

Pitch data for each of the five constituent tones of Cs and Es is created, but since the first rotation signal F1 is given, the middle Ea
, Ga, and C5 are selected and emitted as a chord.

Similarly, when the first rotation key 3 is operated and the G code key 2 is operated, the above-mentioned D4. G4, Ba, Ds,
Among the pitch data of each of the five constituent notes of Gs, the middle G4
, Ba, and Ds are selected, and the first
When you operate rotation key 3 and code key 2 of A,
Among the pitch data of each of the five constituent sounds, C41, E4, As, Cs', and Es, the middle Ea, A4. G5
' Three pitch data are selected and each is emitted as a chord.

In this way, a chord with a substantially constant range specified only by chord key 2 is inverted one step up in -temperament by i1 inversion key 3, and [)41. It falls within the range of 1 octave of p51, and the range of each inverted chord is almost the same. This is the same for the minor (m) chord.

Furthermore, if you operate the second rotation key 4 and operate the C code key 2, the five pitches of <, Ca, Ea, Ga, C5, and Es will be the same as the operation of only the C code key 2 described above. Although the data is created.

Since the second rotation signal F2 is given, G4 above.

Three pitch data, cs and E5, are selected and emitted as a chord.

Similarly, when the second turn key 4 is operated and the G code key 2 is operated, the above-mentioned D4, Ga, Ba, D5
, among the five pitch data of Gs, the upper Ba, D5
, G5 are selected, and A is selected by operating the second rotation key 4.
When you operate code key 2, the above-mentioned C41, E6,
Among the pitch data of each of the five constituent sounds Aa, C51, and E5, the upper three, A4, C51, and E5, are selected,
Each chord is emitted as a chord.

In this way, the chord, which is specified only by the chord +-2 and whose pitch range is almost constant, is inverted by the first inversion key 3 two chords in one temperament, and falls within the range of one octave from 64 to G5, and each inversion The range of chords will be almost the same. This is the same for the minor (m) chord.

In the above embodiment, the constituent note pattern data of the chord stored in the pattern ROM 7 indicates the pitch difference between each constituent note, but it may also indicate the pitch difference with respect to the lowest note. The chords to be emitted may also include major and minor chords, and the chord pattern data stored in the pattern ROM 7 may be limited to the three basic forms, and the specified inversion content may be used as pitch data. The composition I & note may be slid up or down one octave accordingly.

[Effects of the Invention] As explained in detail above, the present invention stores a plurality of accompaniment chords in a form that falls within a certain range, and inverts the chords so that each chord inversion falls within a certain range. Because the calculation process is performed, it is possible to obtain natural chords that do not deviate from the range of each inversion chord, and the range does not change greatly depending on the type of chord, and it is possible to play at a constant pitch. Moreover, it has the effect of expanding the range of chord structures and making good use of melody sounds.

[Brief explanation of drawings]

The overall circuit diagram of the chord accompaniment device shown in FIG. FIG. 6 is a diagram showing pattern data in which each constituent note of a chord stored in the pattern ROM 7 is shown by pitch difference. 2... Code key, 3... First turn key, 4... Second turn key, 7... Pattern ROM, 8... Usage calculation Circuit, 9...lowest note register, 10...scale register, 11...
...Music sound generation circuit, 13...Speaker. Patent applicant: Casio Computer Co., Ltd. Hood Hayabusa 1 rotation Figure 4 Gobi Kaya 2 no Machi E1 type Figure 5

Claims (1)

[Scope of Claims] A chord pattern storage means for storing a plurality of accompaniment chords in a form within a certain range; a chord specification means for specifying the type of accompaniment chord of the chord pattern storage means; and the chord specification. an inversion specifying means for specifying an inversion of a chord specified by the inversion specifying means; an arithmetic means for performing an arithmetic process such that the chord inversion falls within a certain range according to the inversion specified by the inversion specifying means; 1. A chord accompaniment device comprising musical sound generation and sound emitting means for generating and emitting a musical sound for each constituent note of an inverted chord whose inversion has been calculated by the means.