Abstract: A microprocessor-controlled data-processing system is used to process key strokes from a musical keyboard and output a series of note events (e.g., via midi) to a tone-producing device. The microprocessor runs software which splits the keyboard into at least two zones: A root-select zone which consists of at least one octave of keys, and a strum-trigger zone. Pre-determined notes lists, or chords, are stored in an array in the system's memory. The array classifies the note lists according to (1) chord root (C, C#, D, etc.), and (2) chord type (e.g., major, minor, etc.). Different keys within the strum-trigger zone are pre-assigned to different chord types. Depression of a strum-trigger key as a root-select key is depressed causes the data-processing system to (1) select one of the note lists, and (2) output an arpeggio of the notes contained within the selected list.

Abstract: A method whereby a musician may play drums with his/her feet is disclosed. Foot pedals are provided, which are pressed by the underside of the musician's feet, such as heels or toes. Various linkages may transfer downward pedal movement to a drum-striking mechanism. The drum-striking mechanism includes a striking device which may resemble the drum-striking end of a drumstick, and a drive mechanism, which may include an escapement, e.g., resembling a piano hammer-action mechanism. A system which plays an open/closed hi-hat is disclosed, as well as a system which plays a rim shot.

Abstract: A polyphonic electronic musical instrument is provided wherein a keyboard is used to trigger arpeggiated chords which emulate a strumming guitar sound. Select keys are provided for selecting which notes are included in chords to be strummed. At least one triggering device is also provided for triggering chords. The triggering device is constructed to alternate between two trigger states. The triggering device may be a keyboard key, foot pedal, or other device. The instrument operates in such a fashion that two arpeggiated chords of alternating direction (ascending and descending) may be produced during, and at least partially as a result of, one triggering device cycle from one state to the other and back again.

Abstract: A polyphonic electronic musical instrument is provided including a keyboard, an information processing system, e.g., a microprocessor-controlled computer system, and a tone generating device. The processing system processes data received from the keyboard and sends note-on/note-off commands to the tone-producing device. The processing system groups keys of the keyboard into "key sets". Keys within each set occupy different rows of the keyboard. The processing system commands the tone generating device to effectively produce not more than one tone corresponding with each key set at any one time regardless of how many keys within the set are depressed. A key set may operate in "sustain mode," in which depression of a first key produces a tone which sustains without interruption as long as at least any one key of the same set is in depressed position. Alternately, a key set may operate in "repetition mode.

Abstract: The invention applies to keyboards--for example, musical or typewriter keyboards. Various key top shapes are disclosed which may be identified by touch. These shapes include longitudinal ridges, slots, and rows of ridges, slots, knobs, craters and texturing. Various angled key tops are disclosed also. The preferred embodiment applies to a musical keyboard similar to the Janko design.

Abstract: A keyboard includes a key which drives a swing arm. The swing arm transfers return force from a coil spring or other return force mechanism to the key. The rotational axis of the swing arm is perpendicular to the length of the keyboard. Various key position sensing means utilizing the swing arm are disclosed as well.

Abstract: A keyboard for use in a musical instrument or other application includes a key incorporating two guide pins extending downward from directly underneath the key. The front guide pin passes through two bushings, the rear guide pin passes through one bushing. Various preferred embodiments are disclosed including: Application to a Janko musical keyboard with independent keys and MIDI functions; A combination return spring and motion sensor; a swing arm return spring and contact spring mechanism; and a method of bundling together multiple frame members to hold multiple key rows with enhanced rigidity.

Abstract: A key guide for use in a musical or other keyboard comprises a chassis (17), a bumper (16), a bushing (13) and a track (10). The bushing slides against the track during operation. Bushing support means (12) connect the bushing with the chassis and allow limited side motion of the bushing in response to side force produced during operation. The bumper is formed of a softer material than the bushing and is disposed to cushion impact of the bushing with the chassis. Means are provided to disengage the bumper from the bushing and/or the chassis when compressive side force is reversed. Various embodiments are disclosed which accommodate side force over 360 degrees and in two opposite directions. An embodiment utilizing the invention to guide an independent Janko musical keyboard key is disclosed.