Electronic Stringed Instrument Pitch Correction via String-Pressing Sensor
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Solution Overview
Problem
Conventional electronic stringed instruments experience delays in sound generation due to the time required to extract pitch from a picked string, leading to an unnatural musical performance and uncomfortable playing experience, especially with lower pitched sounds.
Innovation Solution
The electronic stringed instrument employs a string-pressing sensor system that includes both electrical contact detection and electrostatic sensors to rapidly determine the string-pressing position and vibration levels, allowing for immediate sound generation and pitch correction based on detected changes in string vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pitch extraction is performed from the picked string waveform, then accurate pitch determination is achieved, but sound generation delay increases
Solution Approach 1:
The system determines the string-pressing position in advance using the string-pressing sensor before the string is actually picked. This preliminary detection of which string is being pressed allows the system to prepare for sound generation ahead of time, reducing the overall delay when the string is picked and ensuring accurate pitch determination is already established.
2Measurement precision
If multiple detection systems are used to detect string operation, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The string-pressing sensor acts as an intermediary detection device that simplifies the overall system by providing direct electrical contact detection between the string and fret. This intermediary sensor complements the pickup coil's waveform detection capability, creating a two-stage detection system where the string-pressing sensor handles position detection and the pickup coil handles vibration detection, thereby improving overall detection accuracy without excessive complexity.
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 approach significantly reduces the delay between string picking and sound generation, enabling more natural and expressive musical performance by accurately determining the pitch and volume without relying on maximum waveform values.
Implementation Method 1
a string-pressing sensor 44 for detecting a state of contact between each of the plurality of frets 23 and each of the plurality of strings 22
Implementation Method 2
the CPU detects that detects picking of any of the plurality of strings 22
Data Source
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AI summary
An electronic stringed instrument 1 includes a string-pressing sensor 44 that detects a state of contact between each of a plurality of frets 23 and each of a plurality of strings 22. A CPU 41 detects that picking of any of the plurality of strings 22, provides a sound generation instruction to a connected sound source 45 to produce musical sound of a pitch determined based on the detected state of contact, detects a vibration pitch of the string 22 of which picking was detected, and corrects the pitch of the musical sound generated by the connected sound source 45 based on the detected vibration pitch.