Bringing legendary multiband dynamics processing from other powerful digital audio workstations into a native workflow has always been a core design goal for Overstratum. Overstratum OST is our custom REAPER JSFX plugin built specifically to recreate that world-famous multiband upward and downward compression powerhouse.
Whether you want to crush electronic leads into absolute submission, add massive weight to modern drums, or glue an entire mix together with dense Havelland-crafted density, OST delivers that iconic transparent crunch and aggressive Havelland-style forward punch natively inside REAPER without third-party licensing baggage.
Multiband Architecture
Recreating a legendary multiband processor requires precise DSP engineering. Overstratum OST replicates the exact frequency separation and ballistics of the original hardware emulation unit:
- Phase-Coherent 4th-Order Linkwitz-Riley Crossovers: Splits the spectrum cleanly at 88.3 Hz and 2.5 kHz with zero phase smearing or comb filtering.
- Mean-Square Power Detection: Utilizes accurate L/R mean-square energy tracking per band to maintain natural stereo width and spatial depth.
- Dual Upward and Downward Processing: Independently tames harsh peaks with downward compression while lifting low-level details using smooth soft-hinge ballistics.
- Loudness-Neutral Design: Keeps overall perceived loudness stable as you explore different compression depths.
What’s New in Version 3.0
With version 3.0, Overstratum OST gains powerful new controls designed for ultimate mixing flexibility and surgical tonal control without sacrificing CPU efficiency or phase integrity:
- Independent Band ON/OFF Switches: Mute the compression processing on the Low, Mid, or High band individually. Thanks to our spectral tilt-lock design, turning a band off never causes an unwanted frequency dip or volume drop—the signal passes through cleanly at unity gain. Plus, inactive bands bypass heavy mathematical calculations to save CPU.
- Phase-Locked Parallel Mix Knob: Safely blend your compressed signal with the dry input. Operating in the exact same phase-compensated loop as the Delta mode, our custom mix control eliminates comb-filtering issues at the crossover points.
- Dedicated Master GR Meter: Visualizes true overall gain reduction comparing your raw input against the auto-gained parallel output.
Workflow
We designed the interface to keep you focused purely on tone. The clean three-column layout provides immediate access to your primary drive, master depth, and band-specific adjustments:
- Integrated Bipolar Meters: Visualizes both upward expansion and downward compression simultaneously for every frequency band.
- Delta Listen Mode: Solos the exact sonic difference between your phase-aligned dry signal and the processed output.
- Click-Free Bypass: Enables artifact-free A/B testing directly in the signal chain.
Overstratum OST v3.0 is lightweight, completely standalone, and available now for REAPER.