Jog Wheel Playback Speed Control via Contact Detection
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Solution Overview
Problem
Motorized jog wheels in DJ equipment can experience uneven rotation speeds, leading to poor sound quality and distortion during music playback, especially when mixing multiple tracks.
Innovation Solution
An operation device with a rotary operator, a determination unit to detect user contact, and an output unit to adjust playback speed information based on contact detection, ensuring consistent playback even with uneven rotation speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a motorized jog wheel is driven and rotated by a motor, then the playback speed can be controlled, but the rotation speed becomes uneven causing poor sound quality and distortion
Solution Approach 1:
The system continuously detects the rotation speed of the jog wheel and compares it with the target playback speed. When uneven rotation is detected, the system provides feedback to adjust the playback speed, ensuring consistent audio output quality even when the physical rotation varies.
Solution Approach 2:
The patent replaces direct mechanical coupling between the jog wheel rotation and playback speed control with an electronic control system. Instead of mechanically transmitting rotation speed variations, the system uses sensors and processors to detect and correct speed variations, substituting mechanical dependency with electronic regulation.
2Ease of operation
If playback speed is changed in accordance with the rotation speed of the motorized jog wheel, then user control is improved, but uneven rotation speed causes inaccurate alignment of playback points
Solution Approach 1:
The system monitors the actual rotation speed of the jog wheel and continuously adjusts the playback speed to maintain accurate alignment. This feedback mechanism ensures that playback points remain precisely aligned even when users rotate the jog wheel at varying speeds.
Solution Approach 2:
The system dynamically adjusts the playback speed based on real-time detection of jog wheel rotation characteristics. Rather than using a fixed mechanical ratio, the system adapts the playback speed control to match the actual rotation behavior, maintaining precision across varying operational conditions.
3Device complexity
If the rotation speed of the motorized jog wheel is used to control playback speed, then the operation is simplified, but distortion rate increases affecting audio performance
Solution Approach 1:
The patent replaces direct mechanical speed transmission with an electronic control system that detects rotation speed and independently regulates playback speed. This substitution eliminates the direct mechanical link that causes distortion while maintaining simple user operation through the jog wheel interface.
Solution Approach 2:
The system uses feedback control to monitor rotation speed and adjust playback parameters to minimize distortion. By continuously comparing actual rotation with target playback requirements, the system corrects speed variations that would otherwise cause audio distortion, maintaining high fidelity while preserving operational simplicity.
Data Source
AI summary
An operation device includes: a rotary operator (21A, 21B); a determination unit (51) configured to determine whether there is a contact of a user with the rotary operator; and an output unit (52) configured to output, in response to the determination unit determining that there is no contact, first information indicating a playback speed set in advance in the rotary operator and, in response to the determination unit determining that there is the contact, second information different from the first information.