Verti-ish VCA Compressor is a VCA compressor for REAPER designed to deliver classic glue compression with modern stereo flexibility.
Built as a lightweight JSFX plugin, it combines punchy VCA dynamics, harmonic saturation, oversampling, and independent Left/Right control for precise mix shaping.
Ideal for mix bus processing, mastering chains, and drum compression.

Technical Overview of the VCA Compressor for REAPER
This VCA compressor for REAPER implements a feed-forward VCA-style dynamics topology with controllable channel linking and optional harmonic enrichment.
It includes:
- Stereo (linked) or Dual Mono modes
- Independent Threshold, Ratio, Attack, Release, and Makeup Gain for Left and Right channels
- Adjustable 2nd and 3rd harmonic saturation stage
- Sidechain high-pass filter (Off / 60 Hz / 90 Hz)
- Parallel compression via Mix control
- Selectable oversampling modes (2x Relaxed, 2x Steep, 4x Ultra)
Oversampling is available to reduce aliasing artifacts introduced by nonlinear processing stages.
Channel unlinking allows asymmetric dynamics control across the stereo field when required.
No modeled hardware behavior is implied. The processor is designed to provide VCA-style envelope response with additional digital control features inside REAPER.
Key Features of Verti-ish VCA Compressor
- VCA Compression Character.Fast attack response and controlled release behavior suitable for bus glue and punch enhancement.
- Independent Left/Right Controls. True dual-mono operation allows separate compression settings per channel, useful for correcting stereo imbalance or shaping spatial dynamics.
- Harmonic Saturation. Add analog-style coloration with adjustable even and odd harmonic emphasis.
- Oversampling Modes Choose between 2x Relaxed, 2x Steep, or 4x Ultra for cleaner high-frequency handling during heavy compression.
- Detector and Sidechain Options: Peak or RMS detection, HPF sidechain filter (Off / 60Hz / 90Hz) to prevent low-end pumping
Compatibility
- REAPER v7.00 or later
- Native JSFX format (no external wrapper required)
- Windows tested
Installation
Open REAPER
Go to Extensions → ReaPack → Import Repositories…
Open Extensions → ReaPack → Browse Packages
Search for “Verti-ish VCA Compressor”
Install and Apply
Advanced users can manually install the plugin from the GitHub Release page.
Typical Use Cases
- Mix bus glue compression
- Master bus gentle dynamic control
- Drum bus punch enhancement
- Parallel compression
- Stereo image correction using dual mono mode
FAQ – Verti-ish VCA Compressor for REAPER
Is this VCA compressor for REAPER CPU-intensive?
No. Standard mode is lightweight. Oversampling at 4x increases CPU usage but improves high-frequency clarity.
Can I use it for mastering?
Yes. With low ratios and moderate attack/release settings, it works well for subtle bus control.
Does it support parallel compression?
Yes. The Mix knob allows precise dry/wet blending.
Is it free?
Yes.
The project is hosted on GitHub, where the source code and manual installation files are maintained.