Klevgrand Rum — Free Download
Rum is a stereo room simulator plug-in that places dry audio in varied spaces, from booths to homes, using multi-sampled rooms, filters, modulation, and a ducker for natural ambience.

Purpose and Concept
Rum recreates the effect of recording a sound source from across a real room, a technique often used to add life to dry acoustic recordings. It offers ten carefully sampled rooms, ranging from acoustically treated studio booths to everyday home spaces. Each room includes six mic variants and character options that can be cross-combined for further exploration.
The plug-in is designed for producers and engineers who want to add natural depth and space to their tracks without relying on synthetic reverb. By simulating a realistic stereo room sound, Rum can make a dry source feel as though it was captured in a physical environment, adding a sense of presence and air that complements the original signal.
Key Processing and Control
Beyond room selection, Rum provides a variety of tools to shape the wet signal. An input gain stage and low/high cut filters allow for tonal shaping, while adjustable pre-delay with tempo sync simulates the distance of the sound source from the room’s walls. An advanced stereo spread unit includes three algorithm types and a modulation section for adjusting width and movement.
A built-in ducker automatically tames transients on the wet signal, making it easier to blend the room sound with the dry source without muddiness. The plug-in also includes a generous collection of factory presets, providing immediate starting points for different instruments and musical contexts. Together, these controls give users fine command over the spatial effect.
Workflow and Interface
Rum’s interface is organized into straightforward stages, guiding the user from input to output. The first step adjusts input gain and filtering, followed by choosing a room among the ten available options. Users can then personalize the sound by selecting mic settings and altering the room’s character, and can independently set pre-delay to fine-tune the perceived source-to-wall distance.
For final polishing, the modulation and stereo spread controls allow precise adjustment of the effect’s width and motion. The ducker can be engaged to smooth over transient-heavy material. With all these sections laid out clearly, the workflow encourages experimentation—users can quickly cycle through rooms, presets, and tweaks to find the perfect spatial treatment for any track.
Practical Applications
Rum shines when used on dry or close-miked recordings that need a sense of space. Acoustic instruments like guitars, vocals, and drums can benefit from the realistic room tones, making them feel more alive and organic. The plug-in is also useful for adding subtle depth to electronic or synthesized sounds, helping them sit more naturally in a mix.
The ducker is particularly handy in dense mixes, where excessive room effect can cloud transients. For creative effects, larger room settings and increased spread can push a source into a more ambient, distant space. Because each room can be combined with different mic characteristics, Rum offers a wide sonic palette, from tight and focused to wide and airy, making it suitable for many genres.
Key features
- Ten rooms, each with six mic variants that can be cross-combined
- Three stereo spread algorithms and a modulation unit
- Ducker for automatically taming wet signal transients
- Pre-delay with tempo sync to simulate source-to-wall distance
- Low cut and high cut filters on the effect path
- Input gain stage and a full set of factory presets
Best for
Best for adding realistic, natural room ambience to dry acoustic recordings, vocals, and drums, or for creating subtle spatial depth in electronic productions. Its intuitive controls and built-in ducker make it a flexible tool for both mixing and sound design.