Playback Volume Limit Logic for Safe Media Startup
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Solution Overview
Problem
Existing media playback systems lack mechanisms to effectively limit playback volume when starting or adjusting playback, potentially startling users due to unknown or excessive volume levels, especially when commands are initiated from sources that do not indicate current volume settings.
Innovation Solution
Incorporating a playback device with a processor and memory to store active and volume limit state variables, which detect the source of playback commands and adjust the startup or increased volume accordingly, ensuring a more moderate playback level based on predefined limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the playback device starts playback at the current volume level without restriction, then the playback quality and user preference accuracy are improved, but the user may be startled by sudden loudness when the volume is unknown or excessive
Solution Approach 1:
The system performs preliminary detection of the command source and determines whether to apply volume limiting before playback starts. By checking the source of the playback command and pre-determining the appropriate volume behavior, the system avoids sudden loudness while maintaining playback quality when conditions are favorable.
Solution Approach 2:
The command source acts as an intermediary that mediates between the playback device and the user. By using the command source as a criterion for determining volume behavior, the system indirectly controls playback volume to prevent sudden loudness while preserving audio quality.
2Ease of operation
If the playback device applies volume limiting based on command source detection, then the user experience is improved by preventing sudden loudness, but the device complexity increases due to additional state variables and detection mechanisms
Solution Approach 1:
The system changes the parameter of playback volume based on the detected command source. By dynamically adjusting the volume parameter according to the source characteristics, the system improves user experience without requiring complex hardware modifications, only logical conditional changes in playback behavior.
Solution Approach 2:
The playback device automatically detects the command source and self-determines whether to apply volume limiting without requiring explicit user input or complex external control systems. The device serves itself by making intelligent decisions based on the source of playback commands.
3Device complexity
If the playback device does not indicate current volume to the user, then the device simplicity is maintained, but the user cannot know the volume level and may be startled by unexpected loudness
Solution Approach 1:
The system provides feedback to the user through the command source mechanism. By making the command source a determining factor for volume behavior, the system indirectly communicates volume-related information to the user, as the source itself becomes a predictor of the volume outcome.
Data Source
AI summary
An example first playback device includes programming to perform functions including: (1) storing an active volume state variable in memory, wherein the active volume state variable corresponds to a current playback volume; (2) storing a volume limit state variable in memory, wherein the volume limit state variable corresponds to a playback volume limit of the first playback device; (3) detecting a command to begin playback of media at a proposed playback volume different from the current playback volume; (4) based on comparing (i) the playback volume limit and (ii) the proposed playback volume, selecting a startup playback volume; (5) playing back media at the startup playback volume; and (6) causing at least a second playback device of the media playback system to play back media at the startup playback volume.