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48 kHz only: drop 96 kHz from the AES67 output

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All sources (player, test signals) are 48 kHz; at 96 kHz Spotify and HLS
played at the wrong speed. Validation, the page and the docs allow 48000
only, and a 96000 stored before is reset to 48000 at boot (stored values
aren't re-validated, and the SDP would still have said 96 kHz).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Ben Nicholson
2026-09-26 07:30:39 +10:00
parent 62b32c31ff
commit 05f4ce45c3
4 changed files with 17 additions and 9 deletions
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docs/aes67-core-base.md
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@@ -19,7 +19,7 @@ Reference devices for UI and defaults: Riedel Bolero (PTP status), Riedel Direct
## Config schema (core groups)
- ptp: {mode: multicast|hybrid, role: slave|auto|master, domain, priority1, priority2, log_sync, log_announce, announce_timeout, log_delay_req, dscp, hw_ts}
- aes67: {name, enabled, discovery: manual|sap, mcast, port, ttl, dscp, channels, mono_sum, encoding: L16|L24, rate, ptime, pt, ssrc, clk_offset, session_id, session_ver}
- aes67: {name, enabled, discovery: manual|sap, mcast, port, ttl, dscp, channels, mono_sum, encoding: L16|L24, rate: 48000 only (all sources are 48 kHz), ptime, pt, ssrc, clk_offset, session_id, session_ver}
- net: {hostname, vlan, web_on: both|inet|aes67, dhcp, ip, mask, gw, dns} (AES67 / untagged interface)
- inet: {vlan_id, pcp, dhcp, ip, mask, gw, dns} (internet / tagged, only if net.vlan)
- log: {syslog, host, port, level: error|warn|info|debug, facility, format: rfc5424|rfc3164}
docs/user-guide.md
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@@ -105,7 +105,7 @@ The secret is write-only: after saving, the field shows empty. Leave it empty to
| Channels | 2 | 1 or 2. |
| Mono sum | off | Sends (left + right) / 2 as a 1-channel stream. Forces *Channels* to 1; it can't clip. |
| Bit depth | L24 | L24 or L16. |
| Sample rate | 48000 | **Use 48000 with Spotify and HLS** (see [Limitations](#limitations)). |
| Sample rate | 48000 | Fixed; all sources are 48 kHz. |
| Packet time | 1 ms | 0.125, 0.25, 0.333, 1 or 4 ms. 1 ms is the AES67 default and works with nearly all receivers. |
| Payload type / SSRC / time stamp offset | 96 / 0 / 0 | Only change these if a receiver needs it. |
@@ -220,7 +220,6 @@ The full device API (status, config, SDP, firmware) is described in `docs/aes67-
## Limitations
These are known limitations in the current firmware:
- **96 kHz:** only the test tone and pink noise work correctly at 96 kHz. Spotify and HLS are 48 kHz sources and must be streamed at **48000**. At 96 kHz they play at the wrong speed.
- **Autoplay stream on boot:** the checkbox has no effect yet. HLS always starts on boot.
- **VLAN split** (separate VLANs for AES67 and internet) isn't available yet.
- **No password** on the web page or API.