Press kit

Outboard-C — Press Kit

Outboard-C is a studio compressor for Windows and macOS (VST3 / AU / CLAP) built around four voicings — Clean, Classic, Optical, Vocal — and four directions — Compress, Inflate, Expand, Shape. A continuous Auto-Threshold servo rides the threshold toward a target gain reduction, a bipolar Headroom control trims the whole engine colder or hotter, and a full sidechain section adds detector tone and a parametric 8-band sidechain EQ.

Outboard-C plugin interface on a studio desk, 16:9
Press banner — 16:9 (2446×1376)Download ↓

At a glance

Product
Outboard-C
Developer
Outboard Audio (Marcel Kirchhof, Germany)
Type
Studio compressor (mixing + mastering)
Platform
Windows 10 (build 17134) / Windows 11 · x64 — macOS 10.15+ · Intel & Apple Silicon
Formats
VST3, CLAP (Windows) · VST3, AU, CLAP (macOS)
Version
0.1.0
Price
€65
Release date
5 July 2026
Trial
14-day trial (email-gated instant download)
Copy protection
Online activation (license key, machine-based)

Key features

  • Four voicings, one click
  • Auto-Threshold — the knob that listens
  • Headroom — run it colder or hotter
  • Honest ballistics
  • Shape stage with up to 32× oversampling
  • Sidechain, complete
  • 8-band sidechain EQ
  • Sidechain Tone
  • Live display
  • 76 presets, favorites, A/B

Press release

Outboard releases Outboard-C — a compressor with four voicings and a continuous Auto-Threshold

Outboard Audio has released Outboard-C, a studio compressor for Windows and macOS in VST3, AU (macOS) and CLAP formats. It is built around four voicings — Clean, Classic, Optical, Vocal — and four directions — Compress, Inflate, Expand, Shape — behind a shared set of controls.

Classic and Optical switch the detector to a feedback topology for a smoother, self-limiting response; Clean is a neutral feed-forward compressor for mix bus and mastering work; Vocal is tuned for voice. Attack and Release are calibrated to measured 10%–90% gain-reduction transition times rather than a textbook time constant.

Auto-Threshold is a continuous servo that rides the threshold so the average gain reduction settles on a target, independent of input level, with a silence gate. A bipolar Headroom control trims the whole signal path colder or hotter at a compensated output level. The Shape stage adds antiderivative-anti-aliased saturation with up to 32x oversampling.

The sidechain section includes an external sidechain input with a listen mode, stereo linking (L/R or M/S, including a max-linked variant), a four-band tone control that shapes only what the detector hears, and a fully parametric 8-band EQ for the detector signal with per-band type, slope, frequency, gain, Q and solo.

76 factory presets are included across ten categories, with machine-wide synced favorites and A/B compare between two complete plugin states.

System requirements: Windows 10 (build 17134) or Windows 11, x64, or macOS 10.15 or newer (Intel and Apple Silicon).

Outboard-C is available now at outboard.audio/outboard-compressor for €65, with a 14-day trial.

  • Four voicings (Clean, Classic, Optical, Vocal) and four directions (Compress, Inflate, Expand, Shape) sharing one set of controls
  • Continuous Auto-Threshold servo targeting average gain reduction, independent of input level, with a silence gate
  • Bipolar Headroom trim around the detector and saturation stage at a compensated output level
  • Attack and Release calibrated to measured 10%–90% gain-reduction transition times
  • Shape stage: antiderivative-anti-aliased saturation with 2×–32× oversampling
  • External sidechain input with a listen mode, L/R or M/S stereo linking, and a 4-band detector-only tone control
  • Fully parametric 8-band sidechain EQ — type, slope, frequency, gain, Q and solo per band
  • Measured Auto-Gain, variable/smoothed lookahead (−20 to +20 ms), parallel/dry blend and a Delta mode
  • 76 factory presets across 10 categories, machine-wide synced favorites, and A/B compare
  • Passed pluginval at the highest strictness level

About Outboard Audio

Outboard Audio is an independent audio-software developer based in Germany, founded by Marcel Kirchhof. Outboard-C is its third product, alongside Outboard-EQ and Outboard-Slab.

Assets

High-resolution images and logos for editorial use — click to download.

Screenshots

Outboard-C plugin interface, sidechain view, Classic voicing
Sidechain view — Classic voicingDownload ↓
Outboard-C plugin interface, 8-band sidechain EQ view
8-band sidechain EQ viewDownload ↓
Outboard-C plugin interface, preset browser open
Preset browserDownload ↓
Outboard-C plugin interface, Detect / Shape view, Classic voicing
Detect / Shape view — Classic voicingDownload ↓
Outboard-C plugin interface, sidechain view, Clean voicing
Sidechain view — Clean voicingDownload ↓

Logos & downloads

Links

Press contact

Marcel Kirchhof · Outboard Audio

hello@outboard.audio

Review / NFR licenses available on request.

Outboard-C

Get Outboard-C.

Four voicings, a servo that listens, and a sidechain section built to be used — try it free for 14 days.

Windows & macOS · VST3, AU & CLAP

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