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What Your Browser Does to Mic Audio Before It Reaches Your Server
Most developers copy-paste the getUserMedia snippet from MDN, wire up a MediaRecorder, and never think about it again. But what's actually happening under the hood varies wildly across browsers. This episode unpacks the hidden audio pipeline in Chrome, Firefox, and Safari — from default sample rates that drop to 8 kHz on mobile, to Opus codec quirks where higher bitrates can actually hurt transcription accuracy. We explore the constraints API (which is a polite request, not a command), the destructive effects of echo cancellation and noise suppression on speech-to-text, and the practical…
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