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CLAUDE.md: step 7 progress and open HLS items

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HLS plays on AES67; list what to come back to (clock drift vs PTP,
download speed, untested cases) before moving on to cspot.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Ben Nicholson
2026-09-25 15:00:09 +10:00
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@@ -52,6 +52,14 @@ Repo: https://gitea.apointless.space/bsncubed/aes67-ESP32-P4
- [x] 5. SAP discovery, then syslog, then health/temperatures (one at a time). VLAN split moved to phase 2. - [x] 5. SAP discovery, then syslog, then health/temperatures (one at a time). VLAN split moved to phase 2.
- [x] 6. PTP TimeTransmitter: BMCA roles (auto/master), hybrid mode. - [x] 6. PTP TimeTransmitter: BMCA roles (auto/master), hybrid mode.
- [ ] 7. Sources: HLS player, then cspot (Spotify Connect), then failover + /api/player. - [ ] 7. Sources: HLS player, then cspot (Spotify Connect), then failover + /api/player.
- [x] 7.1-7.4 HLS plays on AES67 (PSRAM ring, TS demux + AAC, 44.1 -> 48 kHz). Tested with Triple J Hottest (TS, AAC-LC 44.1k).
- [ ] Come back to HLS (open items):
- Clock drift: the station's encoder clock vs our PTP clock is not corrected. Starts 3 segments (~30 s) behind live, so it shows after hours/days (skip when falling out of the live window, or buffering). Fix: steer the 44.1 -> 48 kHz ratio by a few ppm from the distance to the live edge / ring level.
- Download speed ~1.4 Mbit/s over TLS (fine for ~250 kbit/s; tune buffer sizes / per-chunk overhead).
- Not yet tested: HE-AAC variant (140k), other stations, fMP4/ADTS-only playlists, discontinuities (#EXT-X-DISCONTINUITY), network loss and recovery, long runs.
- Audio starts only after PTP lock (~20 s after boot): intended, TX needs PTP.
- [ ] cspot (Spotify Connect)
- [ ] failover (auto mode) + /api/player
- [ ] 8. Mono sum, gain, polish. - [ ] 8. Mono sum, gain, polish.
## Phase 2 (parked) ## Phase 2 (parked)