Remote Controller for Digital Mixer Signal Level Preview
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Solution Overview
Problem
When editing parameters for a signal processing device independently using a PC, users cannot confirm the output signal levels until the PC is connected to the device, making it difficult to achieve desired signal processing.
Innovation Solution
A controller that sets a dummy signal, detects signal processing paths, calculates signal levels at designated reference points, and displays these levels, allowing users to preview signal levels without an online connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If parameters are edited independently using a PC without connecting to the signal processing device, then parameter editing convenience and portability are improved, but the ability to confirm output signal levels is lost
Solution Approach 1:
The system performs preliminary calculation of signal levels based on edited parameters before actual signal processing occurs. The level calculator computes expected output levels using the relationship between input levels and parameter values, allowing users to preview signal levels in advance without needing to connect to the actual device.
Solution Approach 2:
The system creates a virtual copy of the signal processing environment on the PC, including virtual current memory and scene memory that mirror the actual device's memory structures. This virtual environment allows parameter editing and signal level calculation to occur independently while maintaining data consistency with the real device.
2Measurement precision
If the PC is connected to the signal processing device to confirm output signal levels, then measurement accuracy is improved, but operational convenience and portability are reduced
Solution Approach 1:
The patent replaces the physical connection requirement (mechanical system) with a computational approach. Instead of needing to physically connect the PC to the signal processing device to measure signal levels, the system uses mathematical calculations based on parameter relationships to determine expected levels, substituting computational methods for physical measurement.
3Reliability
If synchronous processing is performed to maintain data consistency between PC and device, then data reliability is improved, but processing time is increased
Solution Approach 1:
The system extracts only the essential data elements that need to be synchronized - specifically the current memory and scene memory contents - rather than performing comprehensive synchronous processing of all device data. This selective extraction approach maintains data consistency for critical parameters while minimizing the time required for synchronization operations.
Data Source
AI summary
A controller remote-controlling a digital mixer which performs signal processing to an input signal by a DSP to output the processed signal is provided with functions of: accepting the setting of level of a dummy signal; calculating a gain of the signal processing at each stage in the DSP based on a value of a parameter used for the remote controlling; calculating level that the dummy signal would have at a reference point selected by a reference point selection button if the dummy signal is assumed to be inputted to the DSP, based on the level of the dummy signal and the calculated gain; and displaying the calculated level in a level display portion.