The TWA LF-01 Ladditude is an envelope-controlled resonant filter pedal from Totally Wycked Audio, a maker whose filter-focused line also includes the Little Dipper and the Dynamorph. It combines a classic resonant filter with a proprietary optical envelope-detection circuit that simultaneously controls the filter and resonance parameters, so your picking dynamics drive both the sweep and the peak of the filter at once12.
The circuit is inspired by the classic analog "ladder" filter found in many legendary vintage synths, the design most associated with Moog instruments such as the MF-101 Lowpass Filter2. Guitar Pedal X reported that the pedal delivers envelope filter, auto wah, and analog synth-style sounds, including resonant filter sweeps and EDM effects2.
Controls and switching
The Ladditude's front panel carries six knobs, a High/Low switch, and two footswitches2.
| Control | What it does |
|---|---|
| Frequency | Sets the filter's base cutoff point2 |
| Resonance Level | Sets the intensity of the filter's peak, with a High/Low switch2 |
| Drive | TWA says it produces the gritty, growly organic tones ladder filters are famous for, with added headroom for crisp and articulate filtering1 |
| EXP Sweep | Sets the range of the sweep2 |
| Level | Sets output volume2 |
| CV Threshold Level | Sets the sensitivity threshold for the detection circuit2 |
| On/Off switch | Switches the CV threshold on or off2 |
| Filter Polarity footswitch | Flips the direction of the envelope response2 |
| Engage/Bypass footswitch | Turns the effect on and off2 |
The +/-15v internal operating voltage is worth noting: TWA says this higher internal voltage is part of what gives the filter its headroom for crisp, articulate filtering effects1.
Where it came from and how it compares
Guitar Pedal X noted that there have been quite a few filter pedals of late derived from either the Korg MS-20 or the Moogerfooger MF-101, and that the Ladditude's controls resemble those designs, though the writer did not identify the circuit's exact source origin2. The MF-101 comparison is a natural one for players: the Moog pedal likewise offers knobs for filter cutoff, resonance, envelope amount and mix3. The Ladditude differs in its optical detection circuit, which TWA says controls the filter and resonance parameters simultaneously rather than through separate envelope amount and mix controls1.
The Ladditude was manufactured in a limited batch of 100 units, and the maker's product page lists it as sold out as of October 20261. Buyers could choose Chrome Knobs or classic Synth Knobs before ordering, and orders carried an approximate one-week build time before fulfillment1.
What reviewers said
Guitar Pedal X's Stefan Karlsson quoted a user who compared the pedal directly to a Moog synth2:
"I haven't found an envelope filter, autowah, or any other effect pedal on the market that can replicate the throaty, res..2."
The user called the pedal sonically remarkable and easier to dial in than other filters they had tried2. Karlsson's own summary of its range:
"Whether it's tight, wet, gurgling chirps or sub- to super-sonic EDM filter sweeps, the Ladditude delivers in spades2."
Guitar Pedal X, February 20252
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Questions
What does the Filter Polarity footswitch do on the Ladditude?
The Ladditude has two footswitches: a Filter Polarity footswitch and an Engage/Bypass footswitch. The polarity switch flips the direction the filter responds to your picking, so the sweep can travel upward or downward as you play harder, giving you two distinct envelope behaviors from the same knob settings.
Is the TWA Ladditude an envelope filter or an auto wah?
It is both, and more. Guitar Pedal X reported that the LF-01 delivers envelope filter, auto wah, and analog synth-style sounds, including resonant filter sweeps and EDM effects. The core is a resonant filter whose cutoff is driven by an optical envelope-detection circuit that reads your picking dynamics.
How much does the TWA Ladditude cost?
At launch in February 2025 it was listed at $299 USD, with European pricing of €294 and £240. The maker's product page later showed a regular price of £230.00 GBP. As a limited edition of 100 units, second-hand pricing may differ.
Is the TWA Ladditude sold out?
Yes. The maker's product page listed the Ladditude as sold out as of late October 2026. It was manufactured in a limited batch of 100 units, and orders placed while it was available carried an approximate one-week build time before shipping.
What is a ladder filter?
A ladder filter is a classic analog filter design found in many legendary vintage synths, most associated with Moog instruments. TWA says the Ladditude is inspired by this circuit, which is known for gritty, growly, organic resonant tones.
How many TWA Ladditude LF-01 pedals were made?
The Ladditude was manufactured in a limited batch of 100 units, according to the maker's product page. Buyers could choose between Chrome Knobs or classic Synth Knobs before ordering.
Sources (3)
- TWA LADDITUDE, Godlyke Distributing, Inc.
- Guitar Pedal X, Guitar Pedal X, 2025-02-27
- Moog MF-101 Lowpass Filter, Vintage Synth Explorer, 2026
