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OPTO-2.sin device panel in Ableton Live
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OPTO-2.sin

An opto-style leveler.

One knob drives threshold and reduction together. Turn Peak Reduction up, the leveling deepens, done. Put it first on a vocal.

Max for Live · Live 12
Measured 3.6:1 at default · 0 samples latency
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CONTROLS

Peak Reduction0–10the whole sensitivity control; there is no separate Threshold
ModeCOMP / LIMITprogram-dependent leveling, or a firmer ceiling
Gain0–10makeup after reduction
Mix0–100%dry/wet blend — a SinAudio addition

MEASURED · Measured effective ratio at default Peak Reduction: 3.6:1. Reported latency at 48 kHz: 0 samples.

HOW IT WORKS

Peak Reduction is the only control that drives the detector — attack and release are not exposed on the panel. At the default Peak Reduction setting, the device's measured effective ratio is 3.6:1; the panel prints no ratio numeral, so there's no printed-versus-measured figure to reconcile. At rest, below the level where the detector engages, it keeps running rather than going fully silent — a low residual, not a hard mute. Every number here is host-measured on the production DSP, not estimated from the reference topology it draws on.

FIRST MOVE

Put it first on a vocal, COMP mode, and raise Peak Reduction until the VU moves only on the loudest phrases. Match level with Gain.

VOCAL LEVELING BEFORE ANYTHING ELSE

  1. Insert OPTO-2 as the first device on the vocal track.
  2. Mode COMP. Raise Peak Reduction until the VU needle works on the loud phrases and rests on the quiet ones.
  3. Bring Gain up until bypass on/off sounds the same loudness — judge the leveling, not the volume.
  4. Back Mix off from 100% if the vocal starts to sound held down.

LATENCY — MEASURED

At 48 kHz the device currently measures 0 samples of reported latency — it declares no lookahead control, so there is no additional plugin-delay compensation for Live to apply beyond the host's own block latency.

INSTALL

Unzip, then move the whole OPTO-2.sin folder into your User Library under Max for Live Devices. Keep the folder together. Needs Ableton Live 12 with Max for Live. Install help →