Start with the source
Use a factory starting point or dial in your DI. Pre EQ, input calibration and a gate help prepare the signal before it hits the engine.
BASS TONE ENGINE
From articulate grit to aggressive modern bass. Keep the weight, shape the bite, and put your bass where it belongs in the mix.
In development · $29.99 USD at launch
Mac AU & VST3 · Windows VST3 in development

Weight. Definition. Control.
BUILD YOUR SOUND
Use a factory starting point or dial in your DI. Pre EQ, input calibration and a gate help prepare the signal before it hits the engine.
Compress the lows and drive the mids and highs. Adjust the split points, shape the distortion, and blend back the clean signal.
Refine it with post EQ, add an IR if you want one, shape the bass harmonics, and keep the final peaks under control.
Undertow is a bass processing chain built around independent frequency bands. Go from a clear, rounded foundation to cutting, driven character without losing control of the low end.
Pre and post parametric EQ with adjustable slopes, dynamic bell and shelf bands, per-band detector choices, and a live spectrum display.
Save complete tones or individual EQ presets. Use the mix-focused EQ tools, compare A/B settings, and bring your own cabinet IRs.
TAKE A CLOSER LOOK

Keep the low band solid while shaping the mids and highs independently. Drag the crossovers on the spectrum, then balance the drive with your clean signal.
BY 476 PRODUCTIONS
Built for recorded DI tracks, virtual bass instruments, and finding a sound that works with the rest of your mix.
Compatibility & setup →Bass tone plugin
PLANNED LAUNCH PRICE$29.99 USD
Purchasing is not open yet. Installation, licensing and downloads will be available here at launch.
GOOD TO KNOW
Its core is a bass tone engine: frequency splitting, compression, distortion, EQ and harmonics. An optional IR loader adds cabinet character when you want it.
The Mac build includes Audio Unit for Logic Pro and VST3 for compatible hosts, with Apple silicon and Intel code in one plugin. Windows VST3 is in development. Specific host and live-rig compatibility will be listed when release testing is complete.
Yes. Route the kick to Undertow’s host sidechain and choose an external detector on the EQ band you want to duck. Each band chooses its detector, using the sidechain provided by your host.
The instruction manual covers each section. The same manual is bundled inside the plugin’s Help menu and can be read offline.