Essentials

STEREO WIDTH

M/S Width with Mono Bass

Download free Part of NULL JSFX 2.6.1: 113 plugins, free and open source (MIT). Easiest with NULL JSFX Hub.

Controls

Width0 to 200% — Side level: 0% = mono, 100% = unchanged, 200% = twice as wide.
Mix0 to 100% — Blend between original and processed signal.
Crossover0 to 500 Hz — Below this frequency the signal is made mono and the width setting only applies above it (0 = off).

Best uses

Widening pads, synths and backing vocals
Keeping bass and kick mono while widening the top
Narrowing overly wide sources
Mastering stereo adjustments

Properties

Input → Mid/Side split → optional one-pole crossover (lows mono, highs widened) → Side × Width → L/R → Dry/Wet Mix → Output. Zero latency.

Formats

JSFXJSFX for REAPER, with REAPER's own sliders
GFXJSFX GFX for REAPER, with its own interface
VST3VST3 for any DAW
CLAPCLAP for any DAW

Factory presets

Mono Check · Gentle Widen · Wide Pads · Narrow Overheads · Master Mono Lows · Mono Bass Wide Top · Extra Wide Synths

In the FX chains and Rack presets

Distorted Throw · Dynamic Width · Harmony Stack · Hat Shine · Mastering Chain · Mix Bus Finisher · Multiband Width · Pusher · Shift Mod · Stepped Autopan · Wide Lift

See every FX chain

Try it

Try it on orOS StudioAdd it to a track in your browser, with its own interface. Nothing to install.