Bull Sub Machine V2 is an audio effect that generates a new sub layer under your original signal, offering control over frequency, resonance, and drive. It includes a live spectrum display and a redesigned interface.
Sub Generation Engine
Bull Sub Machine V2 creates a fresh sub harmonic layer beneath your source audio. The improved generation algorithm builds this bottom end from the input signal, giving you a solid foundation to shape. You can set the frequency of the generated band with the Freq control, tune its resonance using Res, and push the level with Drive to add grit or weight.
The Subs control adjusts the amount of sub content mixed in, letting you go from a subtle low-end extension to a massive, chest-hitting bottom. The live spectrum display shows the sub content against the original signal, so you can see what you are generating instead of guessing. This makes it easy to match the sub layer to your track’s key or blend it naturally.
Shaping and Control
V2 adds a new Transients control, described as a signature move for shaping low-end punch. This lets you emphasise or tame the attack of your bass elements, giving you tighter or more aggressive transients. The Res control tunes the resonance of the generated band, allowing you to focus energy at a specific frequency for more character or to avoid muddiness.
Smart Gain and Link Gain help with level matching, keeping your output consistent as you dial in the effect. An A/B compare feature lets you quickly toggle between settings, and a short-term LUFS readout gives you a real-time level measurement. This is useful for ensuring your sub-enhanced mix sits at the right loudness without clipping.
Interface and Workflow
The V2 interface is completely redesigned, featuring a new preset system that makes it easy to save and load your favourite settings. The controls are laid out logically, with the spectrum display positioned above the main knobs for quick reference. This setup lets you see and hear exactly what the effect is doing at a glance.
The included controls—Drive, Freq, Subs, and the new Transients—allow you to dial in the whole low end in seconds. The A/B compare and LUFS meter are practical tools for mix decisions, while the oversampling algorithm helps maintain clarity in the high-frequency range. This workflow is built for fast, intuitive adjustments during a session.
Practical Applications
Bull Sub Machine V2 is designed for use on kicks, bass, 808s, drums, synths, and busses whenever the bottom needs extra weight. It is particularly useful for hip-hop, trap, and electronic music where a strong sub presence is essential. The developer suggests trying the Input control a little lower than feels right to get more subs from the effect.
This makes it a versatile tool for mixing and sound design. On a kick, it can add punch and depth; on a bassline, it can create a more powerful low end without replacing the original tone. On a bus, it can glue low frequencies together across multiple tracks. The spectrum display helps you verify that the generated subs are musically coherent with the source.
Key features
- Live spectrum display for seeing generated subs against the source
- Transients control for shaping low-end punch
- Res control to tune the resonance of the generated band
- Improved sub generation algorithm
- Drive, Freq, and Subs controls for quick low-end shaping
- Smart Gain and Link Gain for level matching
- A/B compare, short-term LUFS readout, and oversampling algorithm
- Redesigned V2 interface with new preset system
Best for
Best for adding sub-harmonic weight to kick drums, basslines, 808s, and full mixes in genres like hip-hop and trap. Also suits sound designers wanting to enhance low-end performance on synths or individual tracks during mixing and production.