Dual-Touchscreen Interface for Precise Digital Audio Playback Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DJ software for tablet computers lacks precision and professional-grade interaction methods for controlling digital multimedia data, particularly in digital audio playback, making it unsuitable for professional DJing.
Innovation Solution
A touch-sensitive device with a dual-touchscreen interface allows for precise control of digital multimedia data playback by using two touch-sensitive portions: one for displaying a detailed excerpt of audio data and another for the entire waveform, enabling users to control playback speed and position with finger gestures, and switch between modes for scratching and setting new playback positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single touchscreen interface is used for controlling playback, then the device is simple and portable, but precision of data input and playback position control is insufficient
Solution Approach 1:
The touchscreen interface is segmented into multiple independent touch-sensitive portions, each dedicated to specific control functions. This segmentation allows precise control of playback parameters while maintaining a relatively simple overall device structure, as each portion handles specific tasks independently.
Solution Approach 2:
The interface transitions from a single-dimensional touch surface to a multi-dimensional control space by incorporating multiple touch-sensitive portions that can be touched simultaneously or sequentially. This dimensional expansion enables more precise data input without significantly increasing device complexity.
2Measurement precision
If detailed waveform excerpt is displayed in one portion and entire waveform in another, then playback position control precision is enhanced, but the interface becomes more complex
Solution Approach 1:
The display is segmented into multiple portions with different levels of waveform detail. The first portion shows a detailed excerpt of the waveform for precise playback position control, while the second portion displays the entire waveform for contextual reference. This segmentation enables high-precision control without overwhelming the user with excessive information in a single view.
3Ease of operation
If multiple touch-sensitive portions are used for different control functions, then ease of operation is improved, but device complexity increases
Solution Approach 1:
Each touch-sensitive portion is designed to handle multiple control functions within its domain. For example, portions can detect both single touches for position selection and multi-touch gestures for playback control. This multi-functionality improves ease of operation while limiting the number of separate components needed.
Data Source
AI summary
A device for controlling playback of digital multimedia displays in first and second portion a representation of a part of the multimedia data, where in the first portion a representation of a part of the multimedia data, which is displayed on the second portion, is displayed, and where the first portion operatable in at least a first and a second mode, wherein the first mode independently of a position of a touch point a direction and a speed of the playback is controllable in dependence of a change of the touch point, andin the second mode a new playback position is definable in dependence of the position of the touch point,for displaying in the second portion a marker for indicating a neighbourhood around the playback position, andfor switching the modus of the first portion, when the marker is moved by user input.