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AssigneeKabushiki Kaisha Kawai Gakki Seisakusho
InventorsTadayuki Ishida, Katsuhiko Torii
Estimating the term…
An acoustic control system for an electronic musical instrument, which can obtain optimal acoustic characteristics irrespective of whether or not a low range speaker is attached to a body thereof. A piano body has high range and mid range speakers. A low range speaker is removable from the body. A stand-excluding switch designates a first speaker-use mode for using the high range and mid range speakers alone, and a stand-including switch designates a both speaker-use mode for using both the high range and mid range speakers and the low range speaker. A ROM stores stand-excluding and stand-including factors for setting acoustic characteristics in the two modes, respectively. A CPU reads one of the factors, which corresponds to the mode designated by the stand-excluding or stand-including switch. A tone generator circuit generates a musical tone signal to be reproduced in one of the modes, based on the read factor.
An acoustic control system for an electronic musical instrument, comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Details of electrophonic musical instruments: constructional details
Music: plural speakers
Electrophonic musical instruments
Technical subjects covered by former uspc cross-reference art collections [xracs] and digests
Term end not estimated
1. Field of the Invention
This invention relates to an acoustic control system for an electronic musical instrument, for controlling acoustic characteristics of the electronic musical instrument having a musical instrument body and a speaker removable from the musical instrument body.
2. Description of the Prior Art
FIG. 1 is a perspective view of an electronic piano incorporating an acoustic control system according to the invention;
FIG. 2 is a partial plan view of an operation panel of the FIG. 1 electronic piano;
FIG. 3 is a circuit diagram showing circuitry for controlling tone generation of the FIG. 1 electronic piano;
The invention will now be described in detail with reference to the drawings showing preferred embodiments thereof.
Referring first to FIG. 1, there is shown an electronic piano incorporating an acoustic control system according to the invention. This electronic piano 1 has a piano body 2 (musical instrument body) and a stand 3 supporting the piano body 2, and further includes a pedal 4 and a music stand 5. The stand 3 is removably attached to the piano body 2 by left and right screws, not shown. That is, the electronic piano 1 is a portable type which can be carried without the stand 3 by removing the same from the piano body 2.
On the top of the front portion of the piano body 2, there is arranged a keyboard 6 in a manner extending in a left-right direction, as viewed in the figure, while on the top of the rear portion of the same, there is arranged an operation panel 7. The keyboard 6 is comprised of numerous keys 6a and key switches, not shown, each of which is opened/closed (turned on/off) by key-on operation/key-off operation of the corresponding one of the keys 6a. As shown in FIG. 2, on the operational panel 7, there are arranged a power switch, not shown, a master volume 8, various switches 9, a display 10, and so forth. The master volume 8 is used for setting the entire tone volume of the electronic piano 1. The switches 9 include a demonstration performance switch 9a, lots of tone color selection switches 9b, a stand-including switch 9c and a stand-excluding switch 9d each used as designation means for designating a speaker use mode, described hereinafter, and a tempo switch 9e, all of which are arranged in the mentioned order from the left. The display 10 is formed e.g. of liquid crystal, and displays settings of the master volume 8 and the switches 9, etc.