Abstract: The present invention provides a heat-resistant, laminated conveyer belt comprising a reinforcing layer obtained by impregnating fluoroplastic into a heat-resistant fiber base cloth, drying and sintering the base cloth and a wear-resistant layer, formed on the reinforcing layer, obtained by impregnating fluoroplastic into a base cloth formed by weaving heat-resistant fiber in the form of a knit weave, drying and sintering the base cloth, and its manufacturing method.

Abstract: An electronic musical instrument includes circuitry for modifying an ordinary address signal which changes at a uniform rate over one cycle of a waveform, into a modified address signal whose rate varies in one cycle of the waveform by the use of a modification signal.The modified address signal accesses a storage device such as a ROM in which waveform data is stored, thereby producing the modified waveform data from the storage device. The modification signal is obtained from the ordinary address signal through a predetermined logic circuit.

Abstract: Code data representing a plurality of note frequencies are stored in a first ROM and are selectively read out according to key operation of a keyboard. With the operation of a key, predetermined control data is also obtained, and this control data is cumulatively added to or subtracted from the code data as an initial value, whereby a note frequency signal corresponding to the operated key is obtained. Portions of the waveform of the resultant note frequency signal where there is a sharp change in amplitude are interpolated with a sine wave stored in a second ROM.

Abstract: A transparent operation plate is disposed on the operation panel of an input device in correspondence with tone information to be input. A pair of touch contacts are formed exposed on the surface of each transparent operation plate. A liquid crystal display element is disposed immediately below the transparent operation plate. The liquid crystal element displays characters representing the tone information, as well as the information input operation condition. This display can be visually confirmed through the transparent operation plate.

Abstract: Waveform data for converting attack, decay and release status sections of a musical sound envelope into an exponential function waveform is obtained from an envelope generator wherein exponential function waveform data is read out from a ROM or obtained through calculation based upon an exponential function in a digital logic processing circuit, and it is used for the envelope control of a tone signal from a digital wave generator.

Abstract: An electronic musical instrument includes circuitry for modifying an ordinary address signal which changes at a uniform rate over one cycle of a waveform, into a modified address signal whose rate varies in one cycle of the waveform by the use of a modification signal.The modified address signal accesses a storage device such as a ROM in which waveform data is stored, thereby producing the modified waveform data from the storage device. The modification signal is obtained from the ordinary address signal through a predetermined logic circuit.