Abstract: Keyboard musical performances are converted to MIDI signals which are coupled to a plurality of remote venues where the music is recreated in a plurality of live real time performances.

Abstract: A musical keyboard instrument (EM1) keyboard which has a plurality of keys, a common pivot point for said keys and a spring biases each key to a uniform position, each key having an associated weight member and a common fulcrum point for each associated weight member, and each key having a dependent weight actuator member engaging its associated weight member, respectively, such that when a key is depressed by a musician the "feel" to the musician is that of a given type of keyboard instrument. A device for disabling the effect of at least some of said associated weight members changes the "feel" to the musician of the keyboard. The device for disabling includes a bar member pivotally mounted to the instrument frame and beneath the associated weight members and a device for rotating the bar member in a direction to rotate the associated weight members about the common fulcrum point and disengage the weight actuator members from engagement with the associated weight member.

Abstract: A system for rejuvenating old keyboard instruments has an array of key sensor switches which are individually adjustable in a horizontal plane to accommodate varying angulations of the keys behind the balance rail of the keyboard and each key sensor switch includes a friction retained sensor probe which enables a rapid and accurate accommodation of uneven keys.

Abstract: A system for expeditiously rejuvenating conventional old keyboard musical instruments to MIDI standards at low cost is disclosed. One or more linear arrays of key actuation sensors and a printed circuit board carry the key actuation sensors for sensing key actuation and expression effects by a musician are mounted above the keyboard of the musical instrument by a rigid mounting bar to convert each key actuation and expression effect of the musician to first coded electrical signals, respectively. Each key actuation sensor incudes a device for individually vertically adjusting the sensor relative to the mounting bar.

Abstract: A system for rejuvenating conventional old or vintage keyboard musical instruments to MIDI standards, includes, one or more linear arrays of key actuation sensors, printed circuit boards carrying the key actuation sensors which sense key actuation and expression effects by a musician, a rigid channel or bar mounting carries the one or more linear arrays under or over the keyboard of the musical instrument to convert each key actuation and expression effect of the musician to first coded electrical signals, respectively. A MIDI controller is connected to receive the first coded digital electrical signals and provide digital note control signals in MIDI format, and one or more performance modules connected to receive the digital note control signals supplying signals to a power amplifier and speaker system to produce a musical performance.