DarkLim

DarkLim — True-Peak Brick-Wall Limiter

A modern, transparent brick-wall limiter designed for mastering and loud loudness work. True-peak inter-sample detection, multiband release scaling, six character modes, and up to 8× oversampling — all the precision you need for the final stage of any mix or master.

Limiting engine:

• True-peak ISP detection — 8-tap Kaiser-windowed sinc upsampling catches inter-sample peaks that exceed digital ceiling between samples (the difference between “true 0 dBFS” and “sample 0 dBFS”)
• Multiband release — three-band LR4 (24 dB/oct Linkwitz-Riley) crossovers at 200 Hz and 2 kHz analyze each band independently, so bass and treble don’t pump each other
• Suppress Overshoot — two-stage protection prevents any ISP exceedance, ever
• Up to 8× oversampling (1× / 2× / 4× / 8×) — Kaiser FIR with O(1) per-sample sliding-maximum tracking

Six shape modes:

• Linear — purely transparent, mathematically precise
• Smooth — gentle, mastering-friendly curve (default)
• Aggressive — fast, tight release for loudness wars
• Punch — preserves transients, ideal for drums and rock masters
• Warm — analog-flavored release shaping
• Transparent — invisible limiting, mastering-grade

Controls:

• Gain (-24 to +40 dB input drive)
• Ceiling (-24 to 0 dB output ceiling)
• Output (-24 to +24 dB post-trim)
• Transient (0–100%) — transient preservation control
• Lookahead (0–10 ms, default 5 ms)
• Attack (continuous 0.01–20 ms, log-skewed)
• Release (continuous 10–1000 ms) with Auto Release (multiband program-dependent)
• Stereo Link (0–100%)
• True Peak on/off, DC Filter, Dither, Unity Gain match

Workflow:

• Factory presets for mastering, loudness, broadcast, transient preservation, and more
• Bypass with sample-aligned PDC compensation