Bump the station build to v1.0.2 and decode streamed WAV chunks into PCM samples on the client before feeding playAudioAll/playAudio, while keeping the HQ WAV path as a fallback for decode failures.
Add a station build version counter, show it on the monitor and terminal header, log it at startup, and report it to the server during register and heartbeat so deployed client versions are visible during troubleshooting.
Increase live WAV chunk size to one second and log chunk acceptance, queue depth, and retry state on stations so the HQ speaker path can be diagnosed from runtime logs.
Slice realtime WAV audio into small self-contained chunks on the server and feed them into the HQ speaker WAV queue on stations so music can start playing before the full file finishes transferring.
Delete the station-side arrival/departure announcement requests and drop the server handlers for train arrival, train departure, and play_sequence messages so preview audio no longer interrupts live music.
Move music playback off the HLS/download-first path and stream 48k mono PCM chunks over WebSocket so stations can start playing immediately. Add station-side PCM chunk playback support and stream lifecycle logging to make no-audio issues easier to trace.
Henry_Du