JPS6238498A - Electronic musical 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 an electronic musical instrument that allows easy performance similar to a guitar performance.

[Prior art and its problems] Conventional electronic musical instruments employ a keyboard system in which when one key (wl) on the keyboard is pressed, a scale note corresponding to that key is produced. Although this type of electronic musical instrument can also produce chords in a rounded manner, it has the disadvantage that producing chords like a guitar requires very advanced playing skills. This also applies to shoulder keyboards.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an electronic musical instrument that can easily be played in a manner similar to that of a guitar.

[Summary of the Invention] In order to achieve the above-mentioned object, the main point of the present invention is that the scale fret input means for generating scale information and the string input means for generating string information are arranged separately from each other. It is.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Figure 1 is an overall external view of this electronic musical instrument.
The basic parameter setting button group l provided on the letter-shaped case is a pushbutton switch for setting basic parameters, and inputs timbre and other various musical tone information, and the information is displayed on the display section 4.

2 is a cable for line out and DC power supply, 3
is the MIDI OUT cable.

Reference numeral 5 denotes six independent string switches constituting string input means for generating string information. Each of these string switches 5 corresponds to each string of a normal guitar, and thereby enables chord playing techniques, arpeggio playing techniques, and the like. When switching is performed using the basic parameter setting button group l, the central processing circuit (not shown) inside the main body case 10 changes from the 6-string mode to the 12-string mode, that is, E, B, G, D, A, It is now possible to shift to state E.

Reference numeral 6 denotes a tremolo arm, which, unlike the conventional system, controls the volume of each scale note by rotating in a horizontal rotation direction with respect to the outer surface of the main body case 10. Further, this tremolo arm 6 is removable. This tremolo arm 6
The pitch or vibrato depth and speed can be controlled by switching using the basic parameter setting button group 1.

The scale fret input means 7 is for generating scale information, and is provided at a predetermined distance from the string input means 5 described above. Further, since the digital tuner button 8 can independently control the frequency of each string, so-called detuning can be applied.

Next, the specific configuration of this embodiment will be explained.

Figure 2 is a cross-sectional structural diagram of the string switch section, Figure 3 is a partially cutaway external view of the silicone rubber contact used in the string switch shown in Figure 2, and Figure 4 is the string switch shown in Figure 2. FIG. 2 is a partially cutaway view showing a contact pattern of a printed wiring board used in the invention.

That is, in FIG. 2, a string switch button 9 is housed in a narrow groove formed in the main body case 10, and on the bottom surface of the string switch button 9 there is a long silicone plate having a cross section of approximately Ω. The rubber member 11 is arranged so that its apex contacts and is pressed down. As shown in FIG. 3, conductive carbon rubber 13 is integrally bonded to the lower surface of this silicone rubber member 11 along the lower surface, and below it is a printed wiring board. Contact points 14 are formed at corresponding positions on 12 and spaced apart from each other. As shown in FIG. 4, this contact point 14 is formed by disposing m-tooth-shaped conductive patterns 14A and 14B facing each other.

By adopting such a configuration, the 1st string switch button 9
No matter which part of the contact point 14 is pressed down, the conductive carbon rubber 13 formed on the bottom surface of the silicone rubber member 11 is used to connect the conductive parts forming the contacts 14 formed on the printed wiring board 124 Pattern 14A, 14B
can be made conductive to each other.

Next, a specific configuration of the scale fret input means will be explained.

FIG. 5 is a sectional view of a membrane type switch of the scale fret input means 7, and FIG. 6 is a partially sectional external view of the scale fret input means 7. In these figures, the conductive rubber 17 is bonded to the lower surface of the fret surface film 16, and since a film spacer 18 is normally interposed between the conductive rubber 17 and the printed wiring board 12, the printed wiring board 1
2. The contact 14 formed on the top and the conductive rubber 17 do not overlap each other, but when pressed from above, the conductive rubber 17 and the contact 14C come into contact with each other. Protrusions 10a are formed at these positions, and these protrusions 10a prevent the printed wiring board 12 from warping downward. The outer surface of the fret surface film 16 constituting the scale fret input means 7 is divided into a matrix of 6 rows and n columns (n is a predetermined number) in order to designate each predetermined scale note. A recessed operation section 16a is formed.

Next, the circuit configuration of this embodiment will be explained based on FIG.

In FIG. 7, a CPU 20 is comprised of a microprocessor and is used to control the circuit operations of the entire electronic musical instrument. And this CPU20 has MIDI
The OUT cable 3 and tremolo arm 6 are connected, and the 7chi/decoders 21 and 22 are connected via the data bus.
A string switch matrix circuit z3, a scale fret matrix circuit 24, a memory group 25 consisting of a RAM and a ROM, and a sound source LSI 26 are connected to each other. In addition, the CPU 20 also scans the switch matrix such as the basic parameter setting button group 1, but this is not shown in FIG.

A string switch matrix circuit 23 is connected to the latch/decoder 21, and a scale fret matrix circuit 24 is connected to the latch/decoder 22, and scanning signals are sent to the string switch matrix circuit 23 and the scale fret matrix circuit 24, respectively. Send out. As a result, the signals output from the string switch matrix circuit 23 and the scale fret matrix circuit 24 are supplied to the CPU 20.

Sound 1; 1LSI 26 is a string switch matrix circuit 23
, a predetermined musical tone signal is created based on both data from the scale fret matrix circuit 24, and after D/A conversion by the D/A conversion circuit 27, a low-pass filter 28,
Volume 29, amplifier 30, line out cable 2
Furthermore, the musical tone is emitted through a speaker (not shown).

Note that the power supply circuit 32 is a stabilized power supply circuit for DC output received from the cable 2 for supplying DC power, and its output is sent to each part in the circuit.

The operation procedure of the electronic musical instrument configured as above will be explained.

First, after setting the timbre etc. in advance using the basic parameter setting button group 1, press the string switch buttons 9 constituting the string switch 5 and predetermined parts of the fret surface film 16 constituting the scale fret input means 7 with your fingers, respectively. Operate and play. Namely.

In the string switch 5, each conductive pattern 14A is pressed by pressing the string switch button 9 that constitutes the string switch 5 using a finger in a playing method similar to a normal guitar playing method.
, 14B are electrically connected through the conductive carbon rubber 13, thereby obtaining predetermined string information, while the scale fret input means 7 presses the 7 left surface film 16 of the required scale note with a finger to input this information. The conductive rubber 17 bonded to the film 16 is brought into contact with the contact point 14, thereby obtaining predetermined musical scale information.

Then, the six string switches 5 are activated by the action of the CPU 20.
Among them, the pressing operation position of the operation part 18a in the 6th row and nth column of the scale fret input means 7 provided corresponding to the string switch 5 that is being suppressed is detected, and the string information, The scale information is sent to the sound source LSI 26 to generate a musical tone signal.

In this embodiment, songs can be played using the same playing technique as a normal guitar.

[Effects of the Invention] As described above in detail, the present invention allows a user to easily play a predetermined piece of music on an electronic musical instrument using a playing method similar to a guitar playing method.

[Brief explanation of the drawing]

FIG. 1 is an external view of an electronic musical instrument according to an embodiment of the present invention, and FIG.
The figure is a sectional view of the main part of the string switch 5, FIG. 3 is a partially cutaway sectional view of the silicone rubber member used in the string switch shown in FIG. 2, and FIG. FIG. 5 is a partially cutaway plan view of the pattern, FIG. 5 is a sectional view of the main part of the scale fret input means 7, FIG. 6 is a partially sectional external view of the same scale fret input means 7, and FIG. 7 is a circuit diagram of the present invention. be. 1...Basic parameter setting button group, 5...
...String switch, 6...Tremolo arm, 7
...Scale fret input means, 9...
String switch button, 11... Silicon rubber member, 13... Carbon rubber. ■4... Contact, 17... Conductive rubber, 1
8...Film spacer, 20...C
PU, 21.22...Latch/decoder, 23
...String switch matrix circuit, 24...
...Scale fret matrix circuit, 25...Memory group, 26...Sound source LSI, 27...
・D/A conversion circuit, 28...Low pass filter, 30...Amplifier. Patent Applicant: Casio Computer Co., Ltd. Subject A Gen 1 Figure 1 Hirosuifuna Atmosphere 7 to Stop) Sword Figure 2 'Izu Figure 3 Figure 4B Figure 4 Gakusho's Eye View Figure 5 Figure 6

Claims (1)

[Claims] A scale fret input means for generating scale information, a string input means for generating string information, which is provided in a separate position from the scale fret input means, and information from the scale fret input means and the string input means. 1. An electronic musical instrument, comprising: musical tone generating means for generating a predetermined musical tone based on the musical tone.