Thumb Bar Controller for Simultaneous Pitch and MIDI Control
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Solution Overview
Problem
Existing electronic musical keyboards require the left hand to operate pitch controls and MIDI effects, limiting musicians who play multiple keyboards or have limited dexterity, as they cannot spare a hand for these functions.
Innovation Solution
The Thumb Bar Controller allows pitch control and MIDI effects to be managed by the thumb of the playing hand, using telescoping levers connected to potentiometers or encoders, enabling simultaneous control of two functions without requiring the other hand or foot pedals, and can be externally attached or integrated into the keyboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional pitch control wheels or joysticks are used on the left side of the keyboard, then pitch and MIDI effects can be controlled, but the left hand is occupied and cannot play another keyboard
Solution Approach 1:
The patent combines pitch bend and modulation wheel functions into a single thumb bar controller that operates with one hand, allowing the other hand to play additional keyboards. This merging of functions resolves the contradiction by enabling multi-keyboard operation while maintaining full pitch and effects control capability.
Solution Approach 2:
The thumb bar controller extends the control interface to a new spatial dimension by positioning it below the keyboard where the thumb can naturally reach, rather than requiring lateral hand movement to traditional left-side controllers. This dimensional shift enables one-handed operation while preserving full control functionality.
2Measurement precision
If foot pedals are used for pitch control, then hands are freed for playing, but pitch control precision is reduced
Solution Approach 1:
The thumb bar controller serves as an intermediary device that bridges the gap between foot pedal operation and traditional hand-controlled wheels. It provides precision comparable to hand controllers while being operable from a position that frees the hands, acting as a mediator between the keyboard and the performer's body.
3Reliability
If a disabled person with one arm uses traditional controllers, then pitch control is possible, but proficiency is limited compared to two-handed operation
Solution Approach 1:
The thumb bar controller is designed to be universally operable by any performer regardless of physical ability. By consolidating pitch and modulation control into a single one-handed interface, it enables disabled performers to achieve the same level of proficiency as able-bodied performers using traditional two-handed configurations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables precise and natural control of sound articulation, allowing musicians to play multiple keyboards proficiently, including those with disabilities, by utilizing the strength and control of the human thumb, and is adaptable to various keyboard sizes and designs.
Implementation Method 1
The telescoping levers (FIG. 4) are connected to a rotary potentiometer or digital encoder (FIG. 5) for the Y axis controller, and a sliding potentiomenter or digital encoder (FIG. 6) for the X axis controller, allowing the performer to simulataneously change two different control voltages
Implementation Method 2
The Thumb Bar controller rests in the center and out position in front of the keyboard, through the use of spring mechanisms on telescoping levers connected on each end
Data Source
AI summary
The Thumb Bar Controller is a bar that runs the width of the electronic musical keyboard playing area, (plus whatever is needed for the lever attachment), connected by two armsrests just below the top, and approximately one inch away from the keys. It gives the performer control over two (or more) functions with the thumb of the playing hand, that would otherwise require the other hand or foot pedals, allowing a person with the disabilty of one arm/hand, to be as proficient as a person with two. It can be used for controlling pitch bend, modulation, MIDI specification controllers, various electronic controls, and product specific controls.The bar can be attached in numerous ways, could use a variety of spring type mechanisms to control it. It can be mounted externally or made as an integral part of the keyboard, with openings for the bar connections and movement required.