Every audio packet was delivered as if it were the next 20 ms, duplicates and
late retransmits included. The monitor's capped ring quietly threw the surplus
away, so the speakers sounded fine — but the recorder keeps every sample it is
given, and the file came out longer than the QSO, slowed and stuttering, each
lost-then-resent packet heard twice. trackRxSeq now says whether a packet
advances the stream, and only those are handed on.
The first real radio on the 50003 stream (an IC-7760) settles the two guesses
the experimental audio path shipped with. The payload starts at 0x18 — the
packet carries a big-endian payload length at 0x14 (0x500 on every packet) —
not at 0x16, which swallowed two header bytes into the PCM and laid a 50 Hz
click track under everything. And rxcodec 0x10 asks for TWO-channel LPCM,
which the mono playback path rendered as double-speed garble; 0x02 asks for
the one channel the monitor plays.
rouggy