loudness-tracked-tilt #1

steve · 2026-08-29T09:11:05-04:00

steve commented

2026-08-29 09:11:05 -04:00

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steve added 9 commits 2026-08-29 09:11:05 -04:00

split-limiting: per-band peak control + post-FIR driver limiters 72dbd1fd62

Keep the EQ (and quiet-listening tonality) untouched; move all peak/
excursion control into the dynamics stages so turning the volume up
runs into limiting, never clipping or woofer bottoming.

- multiband_compressor: 4 -> 6 bands, Modern mode, crossovers
  90/200/500/1500/5000 Hz. Band 0 near-brick-wall (cr 50, al 0.13,
  6 ms); higher bands limit progressively gentler. Thresholds kept
  near stock so sub-threshold (quiet) material is unaffected.
- main limiter release 0.8 -> 0.35 s.
- new wlim (-2 dB) after convLW/convRW and tlim (-1 dB) after
  convLT/convRT: fastLookaheadLimiter instances that clamp the actual
  post-FIR driver signal. wlim is the mechanical-excursion backstop;
  tlim also keeps the tweeter/woofer paths time-aligned.
- outputs rewired to wlim/tlim (FL/FR/RL/RR order preserved).

README updated: signal chain, change table, rationale, tuning knobs.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

split-limiting: pad EQ pre-amp, restore level post-detector 9621f3b2bf

Lower headroom pressure in the EQ / virtualbass stages:
- equalizer g_in 0.7 -> 0.5 (~-3 dB more pad)
- restore the ~3 dB at multiband_compressor g_out 1.0 -> 1.4, after
  the band detectors and right before the main limiter
- scale band thresholds al_0..al_5 by 0.5/0.7 so the compressor
  behaves identically at the lower internal level

Path is 32-bit float end to end so this is about keeping virtualbass
and the plugin detectors out of the red, not fixing hard clipping
(which only occurs at the sink). README updated.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

split-limiting: raise ratios on the sub-500 Hz bands 69214eafff

cr_1 (90-200 Hz) 10 -> 20, cr_2 (200-500 Hz) 7 -> 15. The three
bands below ~500 Hz now all behave as limiters, tightening excursion
and boom control. Thresholds/attacks unchanged. README updated with
the boxy-vocal caveat on band 2.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

split-limiting: move bass drive from woofer FIR into the EQ 3129b557a1

- convLW/convRW gain 1.5 -> 1.15 (near unity)
- EQ bass bells g_1..g_5 raised ~+2.3 dB (1.4/1.9/2.5/2.0/1.5 ->
  1.82/2.48/3.26/2.61/1.75) to keep the same woofer output level

Net woofer SPL unchanged, but the low-end drive now passes through
the multiband + main limiter + wlim instead of being a fixed gain
applied after every dynamics stage. Side effect: ~250-500 Hz woofer
output is ~1-2 dB leaner (g_5 only partly compensated, g_6 not) -
raise g_5/g_6 if you want it flat. README updated.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

split-limiting: -2 dB ceiling on the midbass woofer bands 8e48caa391

al_1 (90-200 Hz) 0.161 -> 0.128, al_2 (200-500 Hz) 0.200 -> 0.159.
With cr 20 / cr 15 these bands pin near threshold, so a ~2 dB lower
threshold = ~2 dB lower peak ceiling. Sub band (band 0) and quiet
material unchanged.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

split-limiting: adjust gain values for midbass and bass frequencies 88e5a4ea7c

update DSP parameters for improved bass response and dynamics; add parameter reference documentation 944b5fd2bb

enhance DSP performance: adjust EQ parameters for improved warmth and reduce distortion risk a3e795767b

Add installation instructions for MacBook Pro 15,1 DSP graph under Linux 97b8229ce1

- Document prerequisites including kernel, ALSA, and required packages.
- Provide steps to clone the repository and install LV2 plugin dependencies.
- Include instructions for verifying plugin URIs and applying the graph.
- Outline troubleshooting steps for common issues.

steve merged commit 0ea346484a into main

2026-08-29 09:11:10 -04:00

steve referenced this issue from a commit

2026-08-29 09:11:11 -04:00

Merge pull request 'loudness-tracked-tilt' (#1) from loudness-tracked-tilt into main

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Reference: t2linux/mbp15-1-audio-dsp#1