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Pink noise as a source (mode "pink")

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Core: aes67_tx_pink_noise(), a ready-made TX source: xorshift32 white noise
through Paul Kellet's pink filter, -18 dBFS RMS (peaks about -6 dBFS), same
on L and R. The player uses it like the tone (straight to TX, no volume or
gain). Checked on the board: -18 dBFS RMS, octave bands 63 Hz-4 kHz flat
within +-0.4 dB, L = R.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Ben Nicholson
2026-09-25 23:37:05 +10:00
parent bbeb7d3fd2
commit 122e46e862
8 changed files with 58 additions and 16 deletions
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docs/aes67-core-base.md
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@@ -142,7 +142,7 @@ components/
aes67_board/ board pin profiles (waveshare_esp32p4_eth.h, …), eth init
aes67_net/ netif setup, optional VLAN split, DSCP/PCP helpers
aes67_ptp/ PTPv2 ordinary clock: BMCA, servo, master, multicast/hybrid, EMAC HW timestamps, stats
aes67_tx/ RTP sender task, PTP-paced, pull callback: size_t (*read)(int32_t *buf, size_t frames), always stereo (AES67_TX_SRC_CHANNELS); TX maps it to the stream (mono: L, or (L+R)/2 with mono_sum)
aes67_tx/ RTP sender task, PTP-paced, pull callback: size_t (*read)(int32_t *buf, size_t frames), always stereo (AES67_TX_SRC_CHANNELS); TX maps it to the stream (mono: L, or (L+R)/2 with mono_sum); built-in test signals: 1 kHz tone at -18 dBFS phase-locked to PTP (source NULL), pink noise at -18 dBFS RMS (aes67_tx_pink_noise)
aes67_sdp_sap/ SDP builder/parser + SAP announcer
aes67_syslog/ remote syslog
aes67_health/ uptime, heap/PSRAM, temperature sensors (temps[] with min/max/warn)