Felitronics Bass Amps

We are Darwin’s Cat: we write music, play music and make a few tools for musicians. Here we share what we build for bass players. Yes, we love bass guitars too ;)

Amp sims

RedGrooveBass: an Ampeg SVT and B15 amp sim (the two voices of the Ampeg SGT-DI pedal) in the cockpit of a walker on Teegarden b.

And OrbitBass brings them all together in one plugin, without cockpits and landscapes: the entire bass chain and the Orbit Bass Cab Builder presets, plus extra features.

Free and open source

Each one runs as a free bass plugin in VST3, AU and CLAP, and as a standalone app for Windows, macOS and Linux. Free means free: no ads, no trials, no subscriptions, no sign-up. And it will stay that way. It is open source: the code is on GitHub under the AGPL.

All the NAM captures the plugins play can also be downloaded on their own, as .nam files for your NAM plugin or NAM-compatible pedal: Darwin’s Cat NAM packs.

We hope you will love these sounds and that they help you make something great. We stand for a beautiful and kind world, and this is our contribution to making it better.

Live long and prosper (Spock). And never buy a "desktop" bass combo: for bass, it is complete junk. The low E on a bass is 41 Hz, and a palm-sized speaker simply can’t play it: instead of the bass you will hear its shadow and lose interest in playing.