JPH023595Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument having a function of emphasizing one note of a pressed key.

In parallel with the normal musical tone generation sequence that generates the notes pressed on the keyboard, a special musical tone generation sequence that detects and generates one note, for example, the highest note among the pressed keys, is provided,
There are electronic musical instruments that emphasize the highest notes (generally corresponding to melody notes). On the other hand, in order to vary musical tones and make them stand out, various effects such as vibrato or tremolo have been conventionally applied to musical tones. When adding effects such as vibrato or tremolo to a special musical tone generation sequence to further emphasize the highest note (melody note), if effects such as vibrato or tremolo are also applied to the normal musical tone generation sequence, the maximum A problem arises in that the effect of emphasizing the sound is weakened, and if the vibratos of both series are not completely synchronized, an unpleasant beat occurs.

This idea was made to overcome the above-mentioned problem, and it is based on the normal musical tone generation sequence and one of the pressed keys.
In an electronic musical instrument that is equipped with a special musical sound generation sequence that selects and generates a sound, when the special musical sound generation sequence generates a musical sound by adding an effect such as vibrato or tremolo, the normal musical sound generation sequence uses vibrato. Alternatively, by prohibiting the addition of effects such as tremolo, it is possible to sufficiently emphasize the effect of vibrato or tremolo in the special musical tone generation sequence, and also to avoid problems such as beat generation. The purpose is to

An embodiment of this invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, a normal musical tone generation sequence 10 is for generating musical tone signals corresponding to one or more keys pressed on a keyboard 12, and generates n musical tones corresponding to the maximum number of simultaneous pronunciations n. It has generation channels ch1 to chn. Since it is possible to generate multiple sounds simultaneously, this series 10 will be referred to as an orchestral series. The special musical tone generation series 11 is for selecting one of the keys pressed on the keyboard 12 and generating the musical tone signal with a tone color different from that of the above-mentioned series 10. The one note selected in series 11 is, for example, the highest note among the pressed keys. Generally, when a melody performance and an accompaniment performance are performed on the same keyboard, the melody performance is performed at a higher pitch than the accompaniment performance. Therefore, the highest pressed key can be regarded as a key for melody performance (melody sound), and the melody sound can be emphasized by specially generating musical tones corresponding to the highest pressed key in series 11. In series 11, only one note is produced, so it is called a solo series.

The pressed key detection circuit 13 detects the pressed key on the keyboard 12, and provides information indicating the pressed key to the sound generation assignment circuit 14. The sound generation assignment circuit 14 is connected to the keyboard 12.
Each of the one or more keys being pressed is transmitted to each tone generation channel ch1 to orchestral series 10.
This is for assigning to chn. Each channel
Key code KC indicating the key assigned to ch1 to chn
is output from the sound generation allocation circuit 14 in a time-division manner for each channel. In addition, the key-on signal KON, which indicates whether the key assigned to each channel is kept pressed or released, is also a key code.
Output is time-divisionally synchronized with KC. Further, channel timing signals Tch1 and Tchn indicating the time-division channel timing of the key code KC and the key-on signal KON are also output from the sound generation allocation circuit 14.

In orchestra series 10, the division ratio ROM
(abbreviation of read-only memory) 15 stores frequency division ratio data for obtaining the musical tone frequency of each key in advance, and responds to the key code KC given from the sound generation assignment circuit 14 in a time-sharing manner. The division ratio data corresponding to the key assigned to each channel is read out in a time-division manner. The frequency division ratio data FD read from the frequency division ratio ROM 15 and the key-on signal KON outputted from the sound generation assignment circuit 14 are input to each of the musical tone generation channels ch1 to chn, respectively.
Although the interior of only one channel ch1 is shown as a representative, the other channels ch2 to chn also have the same configuration. In musical sound generation channel ch1, the frequency division ratio data FD and key-on signal KON are supplied to latch circuit 1.
6 is input. The load control input (L) of the latch circuit 16 is supplied with a channel timing signal Tch1 indicating the time division timing of the channel ch1 from the sound generation allocation circuit 14. Therefore, among the frequency division ratio data FD and key-on signal KON given in a time-division manner, the frequency division ratio data FD1 and key-on signal corresponding to the key assigned to channel ch1 are
KON1 is latched into latch circuit 16. The frequency division ratio data FD1 latched by the latch circuit 16 is input to the variable frequency divider 17. The variable frequency divider 17 divides the master clock pulse φ ₁ oscillated from the master clock oscillator 19 by a frequency division ratio corresponding to the frequency division ratio data FD1 to correspond to the pitch of the key assigned to the channel ch1. Outputs a sound source signal of the frequency. This sound source signal is input to the open/close envelope circuit 18. The open/close envelope circuit 18 receives the key-on signal latched by the latch circuit 16.
Opening and closing of the sound source signal is controlled according to KON1, and amplitude envelope characteristics such as attack, sustain, and decay are added to the sound source signal and output. In this way, the sound source signal of the key assigned to channel ch1 is generated corresponding to the pressing time.

The load control input (L) of the latch circuits (not shown) of other channels ch2 to chn corresponding to the latch circuit 16 of channel ch1 receives a channel timing signal Tch2 indicating the respective time division timing.
thru Tchn are input separately. Therefore, in the other channels ch2 to chn, the frequency division ratio data FD and key-on signal KON of the key assigned to the own channel are respectively latched in the same way as in the channel ch1, and the keys are assigned to the own channel based on these data. A sound source signal corresponding to the pitch of each key is generated. The sound source signals generated from each channel ch1 to ch2 are mixed and input to the orchestral tone filter circuit 20.

The orchestral tone filter circuit 20 is capable of imparting a desired one or more tones to the sound source signal from among a plurality of tones preset for the orchestral series 10, and has filters corresponding to each tone. It consists of multiple filters. The tone to be applied by this orchestral tone color filter circuit 20 is selected by an orchestral tone color selection switch section 21. The orchestral timbre selection switch section 21 functions not only to select a timbre in the orchestral series 10, but also to select whether or not to produce musical tones in the orchestral series 10. That is, if a certain tone is selected by the switch section 21, the musical tone corresponding to that tone is selected from the series 1.
However, if no tone is selected by the switch section 21, no musical tone is generated in the series 10. This is because when all the switches of the orchestral tone selection switch section 21 are off, all the filters of the orchestral tone filter circuit 20 are turned off, and the sound source signals of each channel ch1 to chn are blocked by the filter circuit 20.

The orchestral effect device 40 is for imparting effects such as a vibrato effect to musical sounds generated by the orchestral group 10. When applying a vibrato effect to the orchestral series 10, a vibrato modulation signal is oscillated from the vibrato oscillator 22 in this device 40, and the frequency of the master clock pulse φ ₁ oscillated by the master clock oscillator 19 is determined by this vibrato modulation signal. Modulate periodically. The vibrato oscillator 22 becomes capable of oscillating when a signal “1” is applied to the enable input (ENB), and has an amplitude set by the vibrato depth selector 23 and a frequency set by the vibrato speed selector 24. It oscillates and outputs a vibrato modulation signal. A vibrato selection switch 25 is provided to select a vibrato effect in the orchestral series 10. In this device, the output of the vibrato selection switch 25 is the enable input (ENB) of the vibrato oscillator 22.
Instead of being added directly to the , the addition is controlled by an AND circuit 26 .

On the other hand, in the solo series 11, each channel channel output from the sound generation allocation circuit 14 in a time-division manner
Key code KC and key-on signal KON for 1 to chn
is input to the highest pitch detecting section 27. The highest pitch detection unit 27 sequentially detects the key codes KC of channels ch1 to chn (the channels to which the key-on signal KON is "1") to which the currently pressed key is assigned during one cycle of the time-division channel timing. The key code of the most pressed key is detected based on this comparison. The detected key code of the most pressed key is stored for one cycle of the next time-division channel timing, and is output as the highest tone key code KC _MAX . Therefore, the highest pitch key code KC _MAX is rewritten every channel timing cycle, but if the highest pressed key does not change, the highest pitch key code KC _MAX having the same value is continuously output. When the pressed key no longer exists, the highest pressed key is no longer detected by the highest note detection section 27, and the highest note key code
All bits of the value of KC _MAX are "0".

The highest pitch key code KC _MAX outputted from the highest pitch detecting section 27 is input to the highest pitch key code temporary memory 28 and outputted from the memory 28 after being delayed for a short time (several microseconds). The highest key code temporary memory 28 also includes a circuit for forming a key-on signal SKON based on the input key code KC _MAX and the delayed output key code *KC _MAX . Key-on signal SKON when input key code KC _MAX has any value other than “0”
The value will be “1” indicating the pressed key, and the corresponding key code
When all bits of KC _MAX are "0", the value of the key-on signal SKON is "0" indicating key release.
Also, if the input key code KC _MAX (newly detected highest pressed key) and output key code *KC _MAX (highest pressed key detected immediately before) do not match, that is, when the highest pressed key is changed. , the key-on signal SKON becomes "0" for a short time. This sets the key-on signal SKON to “0” for a short period of time.
This is to muffle the old highest note and make the pronunciation separation between the old highest note and the new highest note clear.

The key code *KC _MAX outputted from the highest key code temporary memory 28 is input to the frequency division ratio ROM 29, and the frequency division ratio data corresponding to the key code *KC _MAX is read from the ROM 29. Division ratio
The frequency division ratio data read from the ROM 29 is input to the variable frequency divider 30. In the variable frequency divider 30,
The master clock pulse φ ₂ oscillated from the master clock oscillator 31 is divided by a frequency division ratio corresponding to the frequency division ratio data read from the ROM 29, and a sound source signal with a frequency corresponding to the pitch of the highest pressed key is output. do. The sound source signal output from the variable frequency divider 30 is input to the opening/closing envelope circuit 32, and the key-on signal generated by the highest key code temporary memory 28 is inputted to the open/close envelope circuit 32.
Opening/closing is controlled according to SKON. The sound source signal given an envelope by the opening/closing envelope circuit 32 is input to a solo timbre filter circuit 33.

The solo timbre filter circuit 33 is capable of imparting a desired one or more tones to the sound source signal from among a plurality of tones preset for the solo series 11, and has filters corresponding to each tone. It consists of multiple filters. The tone to be applied by the solo tone color filter circuit 33 is selected by the solo tone color selection switch section 34. The solo timbre selection switch section 34 has the function of not only selecting a timbre in the solo series 11 but also selecting whether or not to generate musical tones in the series 11. That is, when any tone is selected by the switch section 34, musical tones corresponding to that tone are generated in the series 11, but when no tone is selected by the switch section 34, the tone corresponding to the tone is generated in the series 11. No musical sound is generated at all. The musical tone signal output from the solo tone filter circuit 33 is sent to the orchestra tone filter circuit 2.
It is mixed with the musical tone signal outputted from 0 and added to the sound system 35.

The solo series effect device 41 is for imparting an effect such as a vibrato effect to the musical tones generated in the solo series 11. In this embodiment, the vibrato effect in the solo sequence 11 is selected in conjunction with tone selection. Solo tone selection switch section 34
The output is not only the solo tone filter circuit 33 but also the vibrato data in the solo series effect device 41.
It is also input to the ROM36. vibrato data
The ROM 36 stores in advance vibrato depth data and vibrato speed data corresponding to various tones that can be selected by the switch unit 34. The corresponding data is read. Appropriate values of vibrato depth data and vibrato speed data are stored in advance for tones with a vibrato effect, and these data are read out from the ROM 36 in response to selection of the tones. The vibrato oscillator 37 oscillates a vibrato modulation signal having an amplitude and frequency corresponding to the data read from the ROM 36, and this vibrato modulation signal cycles the frequency of the master clock pulse φ ₂ output by the master clock oscillator 31. modulates. As a result, a vibrato effect is imparted to the solo series 11. On the other hand, for tones without vibrato effects, no data is read from the ROM 36, and no vibrato modulation signal is generated from the vibrato oscillator 37. Therefore, master clock pulse φ ₂ is not modulated and no vibrato effect is imparted.

When applying effects such as vibrato to the solo series 11, the effect prohibition circuit 38 controls the orchestra series 1.
This circuit is for prohibiting effects such as vibrato from being applied when the value is 0. Of all the outputs of the solo timbre selection switch section 34, only the output VIB relating to the timbre accompanied by the vibrato effect is inputted to the NOR circuit 39. The output of the NOR circuit 39 is input to the AND circuit 26 as an orchestral vibrato inhibition signal INH. When this signal INH is "1", the output of the vibrato selection switch 25 for orchestral series, which is applied to the other input of the AND circuit 26, is selected by the AND circuit 26, and the enable input (ENB) of the vibrato oscillator 22 is selected. added to.
Orchestral vibrato prohibition signal INH is “0”
In this case, the AND circuit 26 becomes inoperable, the output of the vibrato selection switch 25 is blocked, and the oscillation operation of the vibrato oscillator 22 is prohibited. Therefore, when the orchestra vibrato prohibition signal INH is "1", whether or not to apply a vibrato effect in the orchestra series 10 is controlled depending on whether the vibrato selection switch 25 is turned on or off. 0'', the vibrato effect in orchestral series 10 is unconditionally prohibited.

When a tone with a vibrato effect is selected by the solo tone selection switch section 34, one of the output VIBs of the switch section 34 becomes "1". As a result, the orchestral vibrato inhibition signal INH outputted from the NOR circuit 39 becomes "0", and the vibrato effect in the orchestral series 10 is inhibited. Therefore, in this case, solo series 1
1, the musical tone corresponding to the highest pressed key is sounded with a vibrato effect, but even if the vibrato selection switch 25 for the orchestral series is turned on, the vibrato effect is not imparted to the musical tone of the orchestral series 10. solo series 1
1 and no vibrato effect is applied, the output VIB of the switch section 34 is "0" and the NOR circuit 3
The orchestral vibrato inhibition signal INH output from 9 becomes "1". In this case, in the orchestral series 10, a vibrato effect is applied when the vibrato selection switch 25 is turned on.

In the embodiment shown in FIG. 1, the vibrato effect in the solo series 11 is selected in conjunction with the tone selection, but it can also be selected in response to the operation of a dedicated selection switch regardless of the tone selection. This idea can be applied. FIG. 2 and FIG. 3 are diagrams showing an example of this, respectively, in which the effect inhibition circuit 38 and the vibrato oscillators 22 and 37 of both series
Only the parts shown are extracted and shown. In FIG. 2, the vibrato effect selection for both series 10 and 11 is performed using one vibrato selection switch VIB-SW. The output of the vibrato selection switch VIB-SW is unconditionally input to the enable input (ENB) of the vibrato oscillator 37 of the solo series 11, and is also passed through the AND circuit 42 to the vibrato oscillator 2 of the orchestra series 10.
It is input to the enable input (ENB) of No.2. All the outputs of the solo tone selection switch section 34 are input to the NOR circuit 43, and when some tone is selected in the solo series 11 (that is, when a musical tone should be generated in the solo series 11), the output becomes "0". ” becomes. The output of the NOR circuit 43 is input to the AND circuit 42. Therefore, the vibrato selection switch VIB-
When the SW is turned on, the vibrato oscillator 37 of solo series 11 starts oscillating operation unconditionally, and solo series 1
A vibrato effect is added to the musical tone generated in 1. At this time, if some tone is selected in the solo series 11 and a musical tone with a vibrato effect is actually produced from the solo series 11, the output "0" of the NOR circuit 43 is used. Then, the AND circuit 42 becomes inoperable, and the vibrato oscillator 22 of the orchestral series 10 becomes inoperable. As a result, the vibrato effect of orchestral series 10 is prohibited. When no musical tone is generated in the solo series 11, the output of the NOR circuit 43 is "1", and when the vibrato selection switch VIB-SW is turned on, the AND circuit 42 is applied to the enable input (ENB) of the vibrato oscillator 22 of the orchestra series 10. “1” is added from . As a result, a vibrato effect is imparted to orchestral series 10.

Figure 3 shows dedicated vibrato selection switches VIB-SW1 and VIB-SW for each series 10 and 11.
An example is shown in which 2 are provided respectively. The solo series vibrato selection switch VIB-SW1 is connected to the enable input (ENB) of the solo series vibrato oscillator 37.
The output of is input directly. Enable input (ENB) of vibrato oscillator 22 for orchestral series
The output of the AND circuit 44 is added to . The AND circuit 44 includes the output of the vibrato selection switch VIB-SW2 for orchestral series and the NAND circuit 45.
The output of is added. The NAND circuit 45 is supplied with the output of an OR circuit 46 into which all the outputs of the solo timbre selection switch section 34 are input, and the output of the vibrato selection switch VIB-SW1 for the solo series. Therefore, when the vibrato effect is selected in the solo series 11 and a musical tone (musical tone to which the vibrato effect has been applied) is actually produced, the output of the NAND circuit 45 becomes "0" and the AND circuit 44 is rendered inoperable. . As a result, the vibrato effect in the orchestral series 10 is prohibited.

In the above embodiment, the effect device 40 for the orchestra series (vibrato oscillator 22) and the effect device 41 for the solo series are provided separately, but one effect device (vibrato oscillator) is used for both series 10 and 11.
It may be used selectively.

Incidentally, in the above embodiment, a vibrato effect is exemplified as an effect imparted to the musical tones generated in the orchestral series 10 and the solo series 11, but
This is just an example, and other effects such as a tremolo effect or a chorus effect may also be used. Further, in the solo series 11, the highest note of the pressed key is emitted, but the present invention is not limited to this, and the lowest note may be emitted. Further, the tone generation method in each series 10, 11 is not limited to the variable frequency division method as shown in FIG. 1, but any tone generation method may be adopted.

As explained above, according to this invention, the musical tones corresponding to one or more keys pressed on the keyboard are generated in the normal musical tone generation sequence, and the musical tones corresponding to the pressed keys are generated in a special musical tone generation sequence different from the normal musical tone generation sequence. When applying various effects such as vibrato or tremolo to a single note (highest or lowest note) selected in a special tone generation sequence in an electronic musical instrument that selects and produces one note (the highest or lowest note), it is necessary to add various effects such as vibrato or tremolo to the note generated in a special tone generation sequence. We have prohibited the application of various effects, so 1 is selectively sounded in a special musical tone generation sequence.
This has the advantage that the effect imparted to the sound can be sufficiently emphasized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of this invention, and FIGS. 2 and 3 are block diagrams showing modified examples of FIG. 1 with only the changed parts extracted. 10... Normal musical tone generation series (orchestral series), 11... Special musical tone generation series (solo series),
12...Keyboard, 13...Key press detection circuit, 14...
Sound generation assignment circuit, 21...Orchestra tone selection switch section, 22...Orchestra series vibrato oscillator, 25, VIB-SW2...Orchestra series vibrato selection switch, 34...Solo tone selection switch section, 37...Solo series Vibrato oscillator, 38...Effect inhibition circuit, 40...Effect device for orchestral series, 41...Effect device for solo series, 39, 43...Noah circuit, 26,4
2, 44...AND circuit, 45...NAND circuit,
VIB-SW……Common vibrato selection switch,
VIB-SW1... Solo series vibrato selection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A keyboard, a first musical tone generation series that generates musical tones corresponding to one or more keys pressed on the keyboard, and a vibrato to the musical tone generated by the first musical tone generation series. Alternatively, a first effect means for imparting various effects such as tremolo, a second musical tone generation series that detects one of the pressed keys on the keyboard and generates that musical tone, and this second musical tone generation a second effect means for imparting various effects such as vibrato or tremolo to the musical tones generated in the sequence; and effect imparting instruction means for selectively instructing each of the first and second effect means to impart an effect; , when the second effecting means imparts various effects to the musical tones in the second musical tone generation series, the first
an effect prohibiting means for prohibiting various effects from being imparted by the first effect means in the first musical sound generation series, regardless of an instruction state for the effect means; electronic musical instruments. 2. The second effect means is a means that operates when a predetermined timbre is selected in the second musical tone generation series and applies various effects such as vibrato or tremolo to the musical tones of the series, and prohibits the above-mentioned effects. The means prohibits the operation of the first effect means when a predetermined tone for operating the second effect means is selected in the second musical sound generation series. Electronic musical instruments listed in section.