Crossfader Gain Control Using Predicted Slider Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fade devices lack the ability to dynamically control the gain of audio signals with precision and predict future slider positions, limiting their capability in creating seamless transitions and special effects in audio processing.
Innovation Solution
A fade device incorporating a crossfader and mixer interconnected via a microprocessor, which generates delayed and predicted slider position signals, allowing for control of audio signal gain through latency and acceleration algorithms, and utilizes buffers to manage slider position data for advanced signal manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a crossfader is used to process musical signals, then signal mixing and fading capabilities are provided, but the ability to dynamically control gain with precision and predict future slider positions is limited
Solution Approach 1:
The system performs preliminary action by predicting future slider positions using third derivatives of actual slider position versus time. This allows the fade device to anticipate user intent and pre-adjust audio signal gains, enabling seamless transitions and special effects like rhythmic cuts and scratch sounds without waiting for actual slider movement to occur.
Solution Approach 2:
The system implements feedback by continuously monitoring actual slider positions, calculating third derivatives, and using this information to adjust audio signal processing in real-time. The microprocessor creates both delayed recordings and predictions of slider positions, providing continuous feedback control that enhances precision and enables advanced signal manipulation.
2Manufacturing precision
If delayed and predicted slider position signals are generated using third derivatives, then precise control over audio signal transitions is enabled, but device complexity increases
Solution Approach 1:
The system replaces mechanical signal processing with computational methods. Instead of using complex mechanical mechanisms to achieve precise fade control, the invention uses a microprocessor to calculate third derivatives of slider position and generate delayed and predicted position signals, achieving high precision through software-based computation.
Solution Approach 2:
The system changes parameters by using third derivatives of slider position versus time to generate control signals. This mathematical transformation converts raw position data into precise control parameters that enable seamless audio transitions and special effects, achieving high manufacturing precision through parameter transformation.
3Adaptability or versatility
If buffers are used to manage slider position data for prediction and delay, then advanced signal manipulation capabilities are provided, but loss of time in data processing increases
Solution Approach 1:
The system performs preliminary action by pre-calculating and storing slider position data in buffers before it is actually needed for audio processing. The main motion buffer records actual slider positions and times, while the delayed slider position buffer stores processed historical data, enabling the system to quickly retrieve and use this information for real-time audio manipulation without processing delays.
Data Source
Figure 1A~1B
Figure 1C
Figure 1D
AI summary
A fade device includes a processor that couples a crossfader to a mixer, the processor using crossfader input to apply an acceleration or a latency to an audio signal passing through a mixer. The mixer receives a first audio input, a second audio input, and one of a signal delayed in time or a signal that is a prediction of future slider movement.