The GUP Tech Poss'M Pitch Shifter - Douche Edition is a dual pitch shifter pedal from GUP Tech, a builder based in Saguenay, Québec, Canada, where the company says all of its pedals are made. It puts two independent pitch shifting voices in one box, aimed at synth, bass and guitar players; the maker describes it as "the Synth/Bass/Guitar Polyphonic Pitch tweaker you need on your board."1 It belongs to the wider family of octave and pitch pedals.
What it does and how it is controlled
The Poss'M carries two completely independent pitch shifting knobs, OCT 1 and OCT 2, each sweeping from -1 to +1 octave. That means each voice can be set anywhere from an octave down to an octave up, independently of the other. A Blend knob sets the balance between the two octave voices, running from 100% of the left voice to 100% of the right voice and passing through a 50-50 mix in the middle.1
Around those two voices sit a Mix knob, covering 0 to 100% wet, and a Volume control that goes up to a +6dB boost. The Mix control is what lets the pedal sit behind your dry signal for a subtle thickening or take over completely for full pitch-shifted synth sounds.1
| Control | What it does |
|---|---|
| OCT 1 | Pitch shift for voice 1, -1 to +1 octave1 |
| OCT 2 | Pitch shift for voice 2, -1 to +1 octave1 |
| Blend | Balance between the two octave voices, 100% left through 50-50 to 100% right1 |
| Mix | 0 to 100% wet1 |
| Volume | Output level, up to +6dB boost1 |
Power
GUP Tech specifies 9Vdc, center negative only, with power consumption of 60mA.1 The same figures appear on the standard Poss'M Pitch Shifter page, so the Douche Edition does not change the power requirements.2
At 60mA, the Poss'M draws more than many compact pedals. A low-output supply output or a shared daisy chain may not run it reliably, so give it its own supply output with enough current headroom.1
Douche Edition and color variants
Douche Edition is GUP Tech's label for special editions across its range. The maker has used the name on pedals including the Moth boost, announcing "The Douche edition of the week is our Moth - Boost!"3 The Douche Edition of the Poss'M is a pedal made by GUP Tech, whose pedals are built in Saguenay, Québec, Canada.1 The maker has offered the standard Poss'M Pitch Shifter in Orange and Purple color options.2
Availability
Both the Douche Edition and the standard Poss'M Pitch Shifter are listed as sold out on the maker's product pages as of 26 October 2026.12 GUP Tech's Douche Edition runs are limited by design, so the pedal may not return in the same form.
Questions
What power supply does the GUP Tech Poss'M need?
GUP Tech specifies a 9Vdc center negative supply only. There is no mention of battery power on the maker's product page, so plan on a standard center negative pedal supply. At 60mA of current draw, it is worth checking that your supply's output has enough headroom rather than sharing it with other pedals on a daisy chain.
How much current does the Poss'M Pitch Shifter draw?
GUP Tech lists power consumption at 60mA on both the Douche Edition and the standard Poss'M Pitch Shifter product pages. That is a moderate draw for a compact pedal, but it is high enough that a low-output supply output or a shared daisy chain may not run it reliably.
Can the two pitch voices be set independently?
Yes. The Poss'M has two completely independent pitch shifting knobs, OCT 1 and OCT 2, each covering -1 to +1 octave. A Blend knob sets the balance between the two octave voices, from 100% of one to 100% of the other, passing through a 50-50 mix in the middle.
What does the Douche Edition mean for GUP Tech pedals?
Douche Edition is GUP Tech's name for special editions of its pedals. The maker has used the label across its range, describing them as the 'Douche edition of the week' on product pages for pedals such as the Moth boost. Functionally they carry the same circuit as the standard version, presented as limited runs.
Is the Poss'M Pitch Shifter Douche Edition still available?
No. As of 26 October 2026, the maker's product page lists the Douche Edition as sold out, and the standard Poss'M Pitch Shifter page also shows sold out. GUP Tech's Douche Edition runs are limited, so the page is kept here as a reference to what the pedal is and how it works.
Sources (3)
- Poss'M Pitch Shifter, GUP Tech (guptech.ca)
- Poss'M Pitch Shifter, GUP Tech (guptech.ca)
- Moth Douche Edition, GUP Tech
