Detection approach
AudioContext destination.maxChannelCount is 1 (mono) on a desktop User-Agent. Real desktop sound cards expose at least 2 channels (stereo). Mono output on desktop is a signature of virtualized audio drivers or headless containers without a physical DAC.
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Virtual machines with mono sound drivers, or systems with custom virtual audio routing.
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