The Spaceman Effects Artemis is a modulated filter pedal that puts a 2-pole state-variable filter with high-pass, band-pass and low-pass outputs under seven modes of modulation1. Unlike most filter pedals, where you pick one filter type and live with it, the Artemis lets you blend its High Pass, Band Pass and Low Pass sections independently, and it can simultaneously output all three12. Spaceman describes it as "an evolution in filter pedals," covering sweep and wah, phase and vibe sounds, and even parametric EQ duty1.
The pedal was released in August 2021, hand-wired and built in Portland, Oregon, and it is currently listed as sold out at Spaceman's own store at $299.0013.
A state-variable filter with seven modulation modes
The core of the pedal is a 2-pole state-variable design, which Pedal of the Day's reviewer said "produces enhanced modulation and mixing capabilities" compared with the usual filter pedal2. A state-variable filter generates high-pass, band-pass and low-pass outputs from the same core circuit, which is why the Artemis can offer all three at once and let you mix them rather than switch between them12.
The seven modulation modes split into two families2:
- Envelope modes: the filter responds to your picking dynamics, sweeping up or down. Pedal of the Day notes you can sweep the filter in both Up and Down directions2.
- LFO modes: four waveshapes move the filter automatically, with the Sens control able to modulate the LFO speed dynamically in response to your playing23.
With modulation cut off, the three filter knobs can be used as a 3-band EQ, which is where the parametric EQ use Spaceman mentions comes in12. Delicious Audio's Paolo De Gregorio described the range of tones available as running "from the synth-like high-pass filter to the classic wha-style band-pass to more subtle and natural-sounding ones mixing all the frequencies"3.
The controls
The control set mixes filter shaping with modulation behavior. The three filter knobs are blendable and independently adjustable, which is the pedal's main departure from most envelope filters2.
| Control | What it does |
|---|---|
| High Pass | Sets the level of the high-pass output; blendable with the other two2 |
| Band Pass | Sets the level of the band-pass output2 |
| Low Pass | Sets the level of the low-pass output2 |
| Freq | Sweeps the corner frequency of the filter directly, or in conjunction with the internal modulation to set the range of the sweep; keep it low for maximum sweep range12 |
| Res | Produces a formant peak ahead of the filter cutoff; at higher settings the resonant peak drives the filter into breakup2 |
| Amount | Controls modulation depth in the envelope modes and speed in the LFO modes2 |
| Sens | Adjusts how responsive the sweep is to the picking dynamics of different instruments; in LFO modes it can dynamically modulate the LFO speed23 |
The Res control deserves a note for players who like aggressive filter sounds: Pedal of the Day found that at higher settings the resonant peak pushes the filter itself into breakup, so the pedal can move from clean filtering into driven, vocal territory without another gain pedal in the chain2.
Expression and CV control
The Exp jack accepts an external expression pedal or a 0 to 5V CV source, connected via a 1/4 inch TRS cable12. This gives direct foot control over the filter, which is what makes the pedal workable as a wah: you sweep the corner frequency by foot instead of with an LFO or envelope. The Freq knob interacts with this, setting the range the sweep covers2.
Limited and Standard builds
Spaceman offers the Artemis in two build variations, a Limited Edition and a Standard Edition1. Both sit in a cast-aluminum enclosure topped with a durable, engraved vinyl faceplate and a jewel indicator light1.
The Artemis is listed as sold out on Spaceman's product page as of October 2026, at a list price of $299.001. The Limited Edition builds in particular may be hard to find secondhand.
What reviewers said
Pedal of the Day reviewed the pedal in January 2021 and was enthusiastic about how far it pushes the format:
"Another home run by the king of home runs, the Artemis Modulated Filter from Spaceman Effects"2
The same review framed the pedal against the history of the effect type, saying filter pedals are "part of one of the oldest and most prominent effect genres there is, and the Artemis takes everything" the genre offers and extends it with features not seen on other envelope filters, including the blendable three-filter control set and the true bypass switching2.
Not to be confused with
Two other products share the Artemis name. Dreadbox, the Greek synthesizer maker, has its own Artemis, and Aion FX sells a DIY project called the Artemis Preamp Drive Mk. I, an overdrive and amp emulation circuit rather than a filter45. Neither is related to the Spaceman pedal.
Videos
R.J. Ronquillo
Demos In The Dark
collector//emitter
Questions
Is the Spaceman Artemis true bypass?
Yes. Spaceman Effects specifies true-bypass relay switching with a soft-touch footswitch, so the signal path is out of the circuit entirely when the pedal is off. Pedal of the Day's review also lists true bypass among the pedal's controls and features.
Can the Artemis be used as a wah?
Yes. Spaceman describes the pedal as covering sweep and wah, phase and vibe sounds, and even parametric EQ duty. With an expression pedal connected to the Exp jack you can sweep the filter by foot, which gives you wah-style control over the corner frequency.
Does the Artemis work with an expression pedal?
Yes. The Exp jack accepts an external expression pedal or a 0 to 5V CV source via a 1/4 inch TRS cable, giving direct control over the filter. The Freq knob works alongside this to set the range of the sweep.
Where is the Spaceman Artemis made?
It is hand-wired and built in Portland, Oregon, by Spaceman Effects. The pedal sits in a cast-aluminum enclosure with an engraved vinyl faceplate and a jewel indicator light.
What power supply does the Artemis need?
It runs on 9V to 24V DC. Spaceman lists the bypass current draw as 46 mA on its product page, though the same page also gives a figure of 72 mA, so the two listings disagree. No battery option is mentioned.
Sources (5)
- Artemis - Modulated Filter - Spaceman Effects, Spaceman Effects
- Spaceman Effects Artemis Modulated Filter, Pedal of the Day (pedal-of-the-day.com), 2021-01-16
- Spaceman Effects Artemis Modulated Filter, Delicious Audio, 2021-08-16
- Artemis Analog Synthesizer, Dreadbox (dreadbox-fx.com), 2025-04-08
- Artemis Preamp Drive Mk. I, Aion FX, 2020-11-25
