Touch Stem Controls With LED Feedback for Portable Audio Remixing
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Solution Overview
Problem
Existing audio output devices lack sophisticated control functionality for musical stems, making it cumbersome to remix tracks on portable devices, which has discouraged widespread use of this feature.
Innovation Solution
An audio output device with touch-sensitive stem control inputs, each comprising multiple segments with illumination elements, allowing users to control audio playback and stem properties through capacitive touch sensing, providing clear feedback and intuitive control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mixing desk or virtual mixing desk is used to control stems, then sophisticated stem control functionality is achieved, but the operation becomes awkward on portable devices
Solution Approach 1:
The device divides the audio track into separate stems, with each stem having its own dedicated control input. This segmentation allows independent control of each stem (playback, volume, panning) without requiring a complex virtual mixing desk interface, making the device suitable for portable use while maintaining sophisticated stem control functionality.
Solution Approach 2:
The audio output device integrates stem control capabilities directly into the portable device itself, eliminating the need for external mixing desks or complex virtual interfaces. Each stem control input is self-contained with touch-sensitive segments that directly control the associated stem, enabling sophisticated control without external equipment.
2Ease of operation
If simple playback control is provided, then the device is easy to operate, but sophisticated functionality for stem control is not available
Solution Approach 1:
The control interface is segmented into multiple independent stem control inputs, each with touch-sensitive segments for different control functions. This segmentation provides sophisticated stem control functionality while maintaining simple, intuitive operation through direct touch interaction, avoiding the complexity of virtual mixing desks.
Solution Approach 2:
Each stem control input has dedicated touch-sensitive segments with specific functions (playback control, volume, panning), allowing localized control of specific stem properties. This local quality approach enables sophisticated functionality while maintaining ease of operation through intuitive, context-specific controls.
3Loss of information
If touch-sensitive control inputs with illumination elements are used, then clear visual feedback is provided, but device complexity increases
Solution Approach 1:
Illumination elements are integrated into each touch-sensitive segment to provide visual feedback about the current state of each stem (playing, paused, volume level). The illumination elements can change color or intensity to indicate different states, providing clear visual feedback without requiring complex display interfaces or additional components.
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
Facilitates simple and intuitive control of musical stems with clear visual feedback, enabling users to easily manage playback, volume, and other stem properties, enhancing the remixing experience on portable devices.
Implementation Method 1
each segment comprises a capacitive touch sensing circuit
Implementation Method 2
The corresponding illumination unit may be an LED
Data Source
AI summary
An audio output device comprises a loudspeaker and, four stem control inputs substantially even spaced on the upper surface of a housing. The stem control inputs are each divided into four segments, each comprising a touch sensor and an illumination unit. Each stem control input is associated with a different stem in an audio track for playback via the loudspeaker. Touching the segments of each stem control input results in the touch being detected and a touch signal being output by the respective segment. In response to a touch signal, the associated illumination unit is togged on/off and a property of the associated stem is varied during playback by loudspeaker.