Variable-Tension Joystick Input for Low-Latency Accessible Music Control
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Solution Overview
Problem
Traditional musical instruments are not adapted for players with physical disabilities, posing challenges due to requirements for full hand control, coordination, and the issue of latency in digital instruments, which can render them unplayable.
Innovation Solution
A variable tensioned joystick with travel distance and a set of keys that can be adjusted for individual players, allowing for minimal movement to generate multiple tones and chords, with integrated processing units to minimize latency and accommodate various disabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional musical instruments are used, then immediate acoustic feedback is achieved, but the instruments require full hand control and coordination that are inaccessible to players with physical disabilities
Solution Approach 1:
The patent replaces traditional mechanical string instruments with a digital input device that uses electronic sensors to detect stick position and key presses. This substitution allows players with physical disabilities to operate the instrument through minimal movements detected by sensors, eliminating the need for complex hand coordination required by acoustic instruments.
Solution Approach 2:
The patent implements variable tension in the stick mechanism and adjustable key sensitivity to accommodate different physical capabilities. The processing unit adjusts digital parameters such as latency compensation and movement threshold detection to match the player's physical limitations, enabling accessible operation while maintaining musical expression.
2Ease of operation
If digital instruments are used to accommodate physical disabilities, then ease of operation is improved, but latency above 10ms renders the instrument unplayable
Solution Approach 1:
The processing unit performs preliminary actions by pre-calculating and buffering sound generation in anticipation of detected movements. When a player presses a key or moves the stick, the system has already prepared the corresponding sound output, eliminating perceptible latency despite the complexity of digital processing required for accessibility features.
3Adaptability or versatility
If variable tension and travel distance adjustments are added to accommodate different disabilities, then adaptability is improved, but device complexity increases
Solution Approach 1:
The processing unit automatically detects the player's physical capabilities through initial calibration movements and self-adjusts tension and travel distance parameters. This eliminates the need for complex manual adjustment mechanisms, as the system adapts to individual players through software-based parameter optimization rather than mechanical complexity.
Data Source
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AI summary
An input device for operating a musical instrument having musical behavior of string instruments, which comprises a key plate unit containing a set of input keys to be pressed by a player, in order to generate a first set of electric input signals, which emulate a combination of pressed keys of a musical instrument or a combination of pressed strings; a stick unit with variable tension of displacement including a stick to be moved by the player between predetermined discrete positions, which emulate a combination of strummed strings of a musical instrument; a set of electric contacts, each corresponding to a different discrete position, for transmitting stick position signals; a processing unit with input buttons for setting musical parameters; a set of interface inputs for receiving the stick position signals; a second set of interface inputs for receiving the first set of electric input signals; a memory for storing processing software; a processor, connected to the memory, for jointly processing the stick position signals and the first set of electric input signals using the processing software, and for outputting electric output signals representing codes of musical notes that corresponds to movements of the input keys between pressed and released positions, and movements of the stick between the discrete positions; interface connections, for transmitting electric output signals representing codes of musical notes, from the processing unit to a computerized tone generating unit that converts the electric output signals to sounds.