Abstract: In one embodiment, a method for the enhanced display of the hands of a pianist playing a piano is disclosed, including: (a) recording at least one video stream of at least one hand of a pianist playing a piano; and (b) while the pianist is playing the piano, using at least a portion of the piano as a display for displaying the video stream.

Abstract: Two-dimensional display section is provided near a keyboard, and, in accordance with performance data, this display section is caused to effect a dynamic display moving, in a given two-dimensional trajectory, from a first display position corresponding to a key to be currently depressed to a second display position corresponding to another key to be next depressed. Thus, a human player can readily intuitively predict the key to be next depressed and depression timing of the next key, in accordance with the display drawing a so-called bouncing-ball-like two-dimensional trajectory that appears as if a ball were bouncing. Further, with a performance guide by the non-conventional or novel bouncing-ball-like two-dimensional trajectory display, the human player can enjoy continuing to play the keyboard, without getting bored, as if the player were following a bouncing ball.

Abstract: A keyboard-type percussion instrument capable of outputting, with high quality, a musical tone to outside the instrument. In an upper part of the instrument, there is provided a tone generator unit including sounding members disposed to respectively correspond to keys of a keyboard and a resonance box in which musical tones generated by sounding members resonate. Action mechanisms each having a hammer felt for striking a corresponding sounding member are disposed below the tone generator unit. Reflection plates and a keybed formed with tone output ports are disposed below the action mechanisms. A musical tone generated by a sounding member struck by a corresponding hammer felt resonates in the resonance box, is output therefrom, passes through the tone output ports, is reflected by the reflection plates, and is output toward rearward of the instrument.

Abstract: A portable modular apparatus that simply and unobtrusively mounts on the top of a piano or keyboard, and detects key movement. The rectangular back side of the modular apparatus serves to effectively mount the apparatus. The self-mounting portable apparatus has associated with each key an optical coupler. The self-mounting portable apparatus has associated with each black key a thin, reflective, flexible insert that positions itself between its respective key and optical coupler when the portable apparatus is mounted. The reflective insert then moves in relation to the movement of its respective key.

Abstract: A receiver in a communication system is coupled to a transmission channel for receiving communication signals transmitted over a transmission channel. The receiver includes signal receiving electronics for receiving communication signals directed to the receiver. The receiver also includes a controller, responsive to the receipt of a communication signal by the signal receiving electronics, to provide an enunciator enable signal, and a clock signal generator for generating a clock signal. The receiver further includes an enunciator coupled to the clock signal generator, for producing an electronic sound signal. The enunciator includes a volume control module for receiving a first periodic signal and providing a volume control signal. The enunciator also includes a divider for receiving the clock signal and providing a corresponding output signal having a frequency corresponding to the frequency of the clock signal frequency divided by a divider value.

Abstract: A receiver in a communication system is coupled to a transmission channel for receiving communication signals transmitted over a transmission channel. The receiver includes signal receiving electronics for receiving communication signals directed to the receiver. The receiver also includes a controller, responsive to the receipt of a communication signal by the signal receiving electronics, to provide an enunciator enable signal, and a clock signal generator for generating a clock signal. The receiver further includes an enunciator coupled to the clock signal generator, for producing an electronic sound signal. The enunciator includes a volume control module for receiving a first periodic signal and providing a volume control signal. The enunciator also includes a divider for receiving the clock signal and providing a corresponding output signal having a frequency corresponding to the frequency of the clock signal frequency divided by a divider value.

Abstract: The identification of the last-actuated of a plurality of parallel connected switches is provided by energizing a light source associated with the last-actuated switch and by providing a coded output signal which identifies the switch. The identification of a closed switch is accomplished through the use of logic circuitry which periodically imposes a potential difference across all of the switch associated light sources. The potential difference is sensed via the closed switch and functions as an initiation signal which causes generation of a coded output signal and maintains energization of the light source.