PC Nest Speaker 2.1.0

Low-latency fast-receiver path restored and hardened, true stereo guidance, and new audio controls.

Highlights

Fast receiver restored. The custom audio receiver (4B876246) was re-broken by an MSE-first regression; it now uses the proven plain-<audio> path again — ~0.5 s startup on Nest Mini, the fastest reliable path.
True stereo on two Minis = Google Home stereo pair. Pair the two speakers in the Google Home app; the pair shows as one device and Google's firmware sample-locks Left/Right. Cast to the pair with the fast receiver for phase-perfect stereo at low latency. (Driving two separate speakers with the same stream causes audible comb-filter "phasing" and is not a stereo solution — see BRAIN.md principle 12.)
⚡ Low Latency button on the Speakers tab — one tap for the snappiest pause/play (best for video / YouTube).
Speed setting (Fastest / Fast / Balanced / Stable) and EQ presets (Flat / Bass Boost / Loud & Clear / Voice / Warm) tuned for small speakers — now in Settings → Audio.
L/R volume pairing — the volume slider sets both fast-pair speakers to the same level.
Faster startup — the speaker list now appears instantly from a cache while a fresh scan refreshes in the background (was a 7–11 s wait).
Reliability fixes: a stale-FFmpeg race that corrupted the stream header (and caused silent re-pairs) is fixed; the disruptive auto re-sync that chimed and stopped music is removed; reconnect-after-unlock restores the fast pair.

Env-gated latency diagnostics remain off by default.
The experimental per-member group fast path stays fenced behind PCNEST_GROUP_FAST_CUSTOM=1; the recommended dual-Mini stereo path is a Google Home stereo pair.

Public release page: https://github.com/Kepners/pcnestspeaker-releases/releases/tag/v2.1.0.
Website installer route: https://www.pcnestspeaker.app/download/windows/setup (302-redirects to the GitHub latest/download/PC-Nest-Speaker-Setup.exe asset, so it always serves the current release).