User Manual · v1.0
BassLifter
From raw DI to mix-ready bass in one click. Everything you need to know — from first install to deep module control.
What Is Bass Lifter?
Bass Lifter is a single-insert processing chain that takes a raw bass guitar DI and turns it into something that belongs in a finished mix — without reaching for a compressor, EQ, harmonic exciter, and limiter one by one.
Six purpose-built modules run in series: an input conditioner, a mud-clearing dynamic filter, a multiband body enhancer, a harmonic generator, a dynamics leveler, and an output stage with soft clipping and transparent limiting. They're calibrated to work together, so one knob — INTENSITY — controls how deep the whole chain processes.
Hit AUTO and Bass Lifter listens to your bass for five seconds, classifies its character, and sets every parameter to a starting point that makes sense for that specific signal. You play. It learns. Then you shape.
Bass Lifter is built for bedroom producers, home-studio bassists, and beatmakers working in pop, funk, rock, and EDM. It assumes you have a clean DI signal and you want a mix-ready result fast — without a studio engineer on call.
Installation
macOS
Get Bass Lifter-1.0.0-unsigned.pkg from the Custom12 download page.
Because Bass Lifter v1.0 isn't signed with an Apple Developer certificate, macOS Gatekeeper blocks a regular double-click. Right-click the .pkg and choose Open. This is a one-time step — macOS remembers the exception permanently.
Click through the standard macOS installer. Both plug-in formats land in the right folders automatically:
AU → /Library/Audio/Plug-Ins/Components/
VST3 → /Library/Audio/Plug-Ins/VST3/
Open Logic, Ableton, Reaper, or your DAW and rescan plug-ins. Bass Lifter appears under Custom12 in the manufacturer list. Logic Pro rescans AU plug-ins automatically on relaunch.
Windows
Get Bass Lifter-1.0.0-Windows.zip from the download page.
Unzip and copy Bass Lifter.vst3 to
C:\Program Files\Common Files\VST3\ — the standard path recognised by all major Windows DAWs.
Trigger a VST3 rescan in your DAW preferences. Bass Lifter will appear in the plug-in browser.
Logic Pro, Ableton Live, Reaper, Studio One, Cubase, FL Studio, Bitwig, GarageBand. Any DAW that loads AU (macOS) or VST3 (macOS / Windows) works with Bass Lifter.
Quick Start
Processing bass in under a minute. Here's the fastest path.
Put it first in the chain, directly on the raw DI. No other processing before it.
This is the default and the sweet spot for most signals. You can dial it in after hearing the result.
Bass Lifter listens, classifies your signal, and sets all parameters automatically. The button shows the result: Balanced, Muddy, Thin, Boomy, or Slap / Pick.
Sweep INTENSITY 0 → 1. At 0 you hear the dry signal. At 1, every module runs at full depth. Most mixes land between 0.6 and 0.8.
Click the power button on any tab header to disable that stage. Start with everything on — only pull modules out if something isn't working for your track.
The processed signal should feel punchier, clearer, and more present — not just louder. If it only sounds better because it's louder, pull INTENSITY back until the levels match your dry track, then judge again.
The AUTO Button
AUTO is the core idea behind Bass Lifter. Instead of guessing where to start, you let the plug-in listen — and it does the heavy lifting.
How it works
When you press AUTO, Bass Lifter captures up to five seconds of your incoming bass signal pre-processing — it hears the dry DI, not what the plug-in is doing to it. It extracts seven acoustic features: overall loudness, dynamic range, sub energy, low-mid energy, high-mid energy, spectral tilt, and transient density. These feed a classifier that places your bass into one of five categories.
| Classification | What it means | What AUTO does |
|---|---|---|
| Balanced | Good frequency distribution, healthy dynamics | Moderate enhancement across all modules |
| Muddy | Excess low-mid energy, low dynamic range | Pushes TIGHT hard, warm harmonics, moderate enhance |
| Thin | Low overall level, weak fundamental | Maximises ENHANCE and HARMONICS, lowers HP filter |
| Boomy | Excessive sub energy, low mid-frequency content | Maximum TIGHT with low mud frequency, pulls sub presence |
| Slap / Pick | High transient density, bright attack character | Fast dynamics attack, bright harmonic tone, preserves snap |
Button states
Ready to listen. Press to start a new analysis at any time.
Capturing audio. Play your bass normally — a riff that represents the character of the part works best.
FFT analysis and classification running on a background thread. No dropout, no glitch.
Classification displayed on the button. All parameters updated. Run AUTO again at any time.
AUTO captures the signal entering the plug-in — the dry DI — not the processed output. You can run it at any point without the plug-in's own processing affecting the classification. It always reacts to the raw character of your bass.
INTENSITY
INTENSITY is the single knob that controls how hard Bass Lifter works. Turn it down and the plug-in steps back. Turn it up and every module pushes deeper.
Technically, INTENSITY is a master scaling factor applied to the amount parameter of every active module. At 0, all processing amounts scale to zero — you hear the dry signal passing through input and output stages only. At 1.0, every module operates at its full set value.
Because the scaling is multiplicative, you can dial in the relative balance between modules on their individual tabs, then use INTENSITY as a single depth control that respects that balance. A module set to 50% amount at INTENSITY 1.0 runs at 37% effective depth at INTENSITY 0.74.
The factory default is deliberately not at maximum. Full-depth processing on every module simultaneously is a lot. Most great-sounding bass tones with Bass Lifter land between 0.55 and 0.80.
Module Reference
Each module can be independently bypassed by clicking the power button on its tab. Bypassing is non-destructive — parameters are preserved and the module re-engages exactly where it left off.
The Input module conditions your signal before anything else touches it. A gain stage compensates for hot or weak DIs, and a high-pass filter removes sub-rumble, handling noise, and low-frequency interference that would muddy every stage downstream.
Muddy bass is the single biggest problem in dense mixes. TIGHT attacks it directly with an adaptive dynamic EQ centred on the low-mid mud zone — the 100–300 Hz range where bass frequencies pile up and make a mix sound cloudy and undefined.
Unlike a static EQ cut, TIGHT responds to signal level: on hard hits the cut engages; during quiet passages it steps back. This preserves fullness on sustained notes while clearing mud on attack transients — exactly what makes a bass "tight."
ENHANCE is where the signature Bass Lifter sound lives. It splits the signal into three bands — sub (below 80 Hz), low-mid (80–300 Hz), and high-mid (above 300 Hz) — and applies different processing to each simultaneously.
The sub band gets a gentle warmth boost. The low-mid band uses a level-dependent inflator: quiet signals get lifted toward the body of the sound, loud signals stay controlled. The high-mid band receives soft saturation that adds presence and bite without harshness. The result is a bass that feels fuller, more alive, and more present — without sounding louder.
Small speakers, earbuds, phones — huge portions of your audience will never hear the fundamental of a bass note. HARMONICS generates musically related overtones so those listening systems have something to translate into perceived low end. It's the difference between a bass that disappears on a phone speaker and one that still drives the track.
The waveshaping works on the upper content of the bass signal (above 80 Hz) to avoid touching the sub fundamental, generating both even-order harmonics (warm, tube-like) and odd-order harmonics (presence, edge). Tone balances between them.
Live bass playing is expressive — and inconsistent. A great performance has notes varying by 10–15 dB across a take. The DYNAMICS module brings those notes together without flattening the life out of the performance.
It uses an upward-expansion and level-smoothing approach: quiet notes get lifted toward the average level, loud notes are controlled, and Punch Preservation protects the initial transient of each note so the attack never disappears into mush.
The Output module is the last thing the signal touches before leaving Bass Lifter. An output gain stage, an optional soft clipper for analog-style saturation, and a transparent peak limiter ensure the signal lands at the right level and never clips the next plug-in in the chain.
Factory Presets
Bass Lifter ships with nine factory presets. Use them as starting points — every parameter is editable, and INTENSITY lets you dial in how much of each preset's character you want.
| Preset | What it does | Best for |
|---|---|---|
| Init | Moderate settings across all modules — a sensible starting point from scratch | Any signal, any genre |
| Sub Sculpt | Heavy Tight processing with low mud frequency — cleans up the bottom end | Boomy DI, thick-sounding active basses |
| Mud Buster | Maximum Tight with extended mid-range cut — aggressive low-mid clearing | Dense mixes, muddy recordings |
| Snap & Pop | Fast dynamics, bright harmonics, moderate enhance — attack-forward | Slap bass, funk, pop |
| Body Builder | High enhance density and harmonics for adding weight to thin signals | Passive basses, thin DI signals |
| Mix Ready | Balanced moderate settings tuned to sit well in a full arrangement | General-purpose — when AUTO returns Balanced |
| Warm Tape | Soft harmonics, gentle enhance, low-density saturation — vintage character | Soul, R&B, classic rock |
| Grit & Grind | Heavy enhance with high Soft Clip — aggressive, driven character | Rock, metal, driven tones |
| Upper Partials | Maximum harmonics with bright tone — strong presence across the spectrum | Small speaker translation, EDM, club music |
Workflow Tips
Dense pop or EDM mix
Run AUTO. Raise Tight Amount to 0.60–0.75, Mud Frequency to 200–220 Hz. Drop Enhance Density below 0.50. Turn Sub Harmonics off — the kick owns that range. Use Ceiling −3 dBFS for headroom.
Vintage soul or R&B
Pull Tight Amount to 0.25 — keep the low-mid warmth. Set Harmonics Tone to 0.7–0.8 for even-order warmth. Enable Soft Clip at 0.20. Dynamics Release at 200–250 ms feels musical at 70–90 BPM.
Slap bass
Run AUTO — it should return Slap/Pick. Confirm Attack is 4–8 ms and Punch Preservation above 0.70. Keep Harmonics Tone above 1.2 for the bright, clanky character. Tight Amount 0.25–0.35.
Thin or weak DI
Raise Enhance Amount to 0.65–0.80, Density to 0.55. Enable Sub Harmonics if the bass sounds hollow. Add Harmonics Amount at 0.40 for small speaker translation. Lower HP Filter to 25–30 Hz.
Rock / metal
Load the Grit & Grind preset as a starting point. Push Soft Clip to 0.35–0.50 for real drive. Tight Amount at 0.60 stops the gain from making the low-mids bloom. Fast Attack at 5–10 ms keeps the pick attack clear.
Accurate A/B comparison
With Auto Gain Comp on, the processed signal should sound better — not louder. Temporarily pull INTENSITY to 0 and compare at the same perceived level. If it only sounds better louder, pull Output Gain back and re-evaluate.
Signal Flow
The audio signal flows through the six modules in series. Bypassing a module removes it completely — the signal passes through as if the module doesn't exist, with no coloration from that stage.
Gain · HP
Dyn EQ
Inflator
Waveshape
Leveling
Clip · Limit
The AUTO analysis thread runs independently of the audio path. When you press AUTO, Bass Lifter captures a copy of the pre-processing signal on a background thread without interrupting audio playback. There is no dropout, no glitch, and no latency change during analysis.
Bass Lifter reports its processing latency to the DAW automatically. In most DAWs, plug-in delay compensation (PDC) handles this transparently. The latency is constant regardless of parameter settings.
Troubleshooting
macOS: Confirm the files are in the right folders:
/Library/Audio/Plug-Ins/Components/ for AU and /Library/Audio/Plug-Ins/VST3/ for VST3.
Trigger a rescan in DAW preferences. Logic Pro rescans AU plug-ins on relaunch — quit and restart.
Windows: Confirm Bass Lifter.vst3 is in
C:\Program Files\Common Files\VST3\ and trigger a VST3 rescan.
The plug-in needs audio flowing through it to capture signal. Make sure the track is playing (or record-enabled with monitoring on) when you press AUTO. Play your bass for the full 5-second capture window — don't stop early.
The heuristic classifier uses fixed acoustic thresholds. If your bass consistently sits near a boundary (for example, mid-energy near the Muddy/Balanced threshold), the specific 5-second window captured can tip the result either way. This is expected behaviour — use the result as a starting point and adjust manually if needed.
The HP Filter may be set too high, cutting into the fundamental. Check the Input module and lower HP Filter to 25–30 Hz. Also check that Tight Amount isn't removing too much low-mid body — pull it back to 0.30–0.40.
Confirm the Limiter is enabled in the Output module. If clipping is still occurring, the signal before the limiter may be peaking very hard — lower Input Gain or reduce Enhance Amount. The limiter handles normal peaks transparently but can't rescue a signal that's 10+ dB over the ceiling.
Bass Lifter v1.0 is not signed with an Apple Developer certificate. Right-click the .pkg file → Open, then click Open in the dialog. macOS saves this exception permanently — the plug-in will load normally from that point forward.
This usually comes from Enhance Amount or Harmonics Amount set too high for the signal. Try pulling Enhance Amount down to 0.35–0.45 and reducing Harmonics Amount to 0.20–0.25. If using Soft Clip, reduce it toward 0. Also check that the HP Filter is removing sub-rumble cleanly — low-frequency content can interact badly with saturation stages.
Reach out at custom12pedals@gmail.com. Include your DAW, OS version, and a brief description of what you're hearing — we'll get back to you.