Android audio_policy_configuration.xml Architecture & Setup
Learn how Android Audio HAL routes streams, maps mixPorts to devicePorts, and configures audio_policy_configuration.xml for custom BSP hardware.
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Audio Driver
Hear Your Microphone Through Speakers on Linux
Create a temporary audio loopback from a named microphone source to a named speaker or headphone sink using pactl. Start at a conservative volume and latency, save the returned module ID, unload that module to stop monitoring, and control acoustic feedback before turning anything up.