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.

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





Logos & downloads
Press contact
Marcel Kirchhof · Outboard Audio
hello@outboard.audioReview / 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
- Secure checkout
- Instant download
- 14-day free trial
- Free updates
- pluginval validated
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