Abstract: The present invention relates to a set of organ pipes including at least 54 pipes, characterized in that said set has a variation in the richness of the harmonics generated by said pipes during use, and in that the ratio of the intensity of the first harmonic to the intensity of the fundamental is at a maximum at a frequency between 150 and 500 Hz, preferably between 200 and 300 Hz, wherein said maximum is different by at least 20 dB with respect to the ratio of the intensity of the first harmonic to the fundamental of the pipe producing the lowest frequency note.

Abstract: The invention relates to a method for the operation of a pipe organ, with at least one of the valves being provided as a valve actuated in multiple ways which can be controlled to open at least on the basis of two different note demands. In accordance with the invention, on a note demand on a valve actuated in multiple ways which is already open due to another note demand, the valve actuated in multiple ways is closed for an interruption time period and then opened again. The invention further relates to a method for the operation of a pipe organ, wherein information input at the console is transmitted via a data bus to remote receiver units which are connected to valves and/or stop pallets for their control, with the receiver units determining individually from the information transmitted whether, and if so, which of the valves and/or stop pallets connected to the respective receiver unit are to be opened or closed.

Abstract: A motor driven tremolo generator adapted to be connected to the pressure regulating air reservoir for a pipe organ is disclosed. The tremolo generator consists of an elongated housing pivotally mounted at one end with a free end being adapted to produce a reciprocating motion for transmission to the pressure regulator. An electric drive motor is mounted at the first end of the housing near the pivot connection, and is connected to drive a rotatable shaft located at the second, or free end of the housing. An eccentrically mounted weight is carried by the shaft so that rotation of the drive motor causes the weight to cause the free end of the housing to oscillate with respect to the pivot point. At a point generally intermediate the pivotal connection and the location of the shaft carrying the concentric weight is a suitable linking mechanism which connects the housing to the center of the bellows, whereby the reciprocating motion of the housing is transmitted to the bellows.