- aes67_tx: TX task woken by an esp_timer every packet time; sends every
packet whose last sample is in the past (PTP time), RTP ts =
(sample index from PTP + clk_offset) mod 2^32, packets aligned to
multiples of the packet size. Sends only while PTP is locked; resyncs
on lock, clock step or > 20 ms lag. L24/L16 big-endian, TTL/DSCP/
multicast IF from config; a config save restarts TX.
- Built-in 1 kHz tone at -18 dBFS, phase from the PTP sample index;
aes67_tx_set_source() pull callback for later sources (underruns
counted, padded with silence). status: tx_packets, underruns.
- Verified with a receiver script on the PC: 1 ms L24 stereo 1000/s,
0 gaps, ts step 48, tone -18.00 dBFS within 1.2 LSB of the ideal
PTP-phased sine; also L16 mono 0.333 ms, 0.125 ms (8000/s) and 4 ms.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
bsncubed
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