The Imp-3PDT is a MIDI upgrade board from Oscillator Devices, made for upgrading effects devices that use a single 3PDT true bypass foot switch. Fitted inside a pedal, it lets the existing switch be controlled over MIDI, so a MIDI controller can bypass and engage the pedal remotely instead of you stomping on it. It is available with a soldered-on foot switch (the Switch assembly variant) or without one, for use with a separate switch, and ships in 3 to 5 days.12
Versions and what fitting one involves
The Imp-3PDT comes in two versions: one with a soldered-on foot switch (the Switch assembly variant), and one without a switch, for use with a separate switch.2
Installation is a soldering job. On the maker's Imp MIDI page, Oscillator Devices shows a second-generation Imp-3PDT installed into an EarthQuaker Devices Hoof v1 as an example, soldered directly onto the pedal's switch with only one hole drilled in the enclosure for the MIDI connection.1
Assembly aids and separate sockets are not included in the scope of delivery and must be ordered separately. For the MIDI sockets, the maker names isolated mini-TRS sockets or the Isolated Mini TRS Socket (Imp-Style).2
The board is small, at 21 × 33 × 45 mm, which matters when fitting it inside an existing pedal enclosure alongside the circuit board.2 Assembly aids and separate sockets are not included and must be ordered separately; for MIDI connections the maker lists isolated mini-TRS sockets or the Isolated Mini TRS Socket (Imp-Style).2
Questions
What is the Oscillator Devices Imp-3PDT?
It is a MIDI upgrade board made by Oscillator Devices for effects pedals that use a single 3PDT true bypass foot switch. The board is soldered into the pedal so the existing switch can be driven by MIDI, letting a MIDI controller bypass and engage the pedal remotely. It comes either with a soldered-on foot switch or without one for use with a separate switch.
How is the Imp-3PDT installed?
Installation is a solder job inside the pedal. Oscillator Devices shows a second-generation Imp-3PDT fitted into an Earthquaker Devices Hoof v1, soldered directly onto the pedal's switch with only one hole drilled for the MIDI connection. Assembly aids and separate sockets are not included and must be ordered separately, along with isolated mini-TRS sockets for the MIDI connection.
How much does the Imp-3PDT cost?
Oscillator Devices lists the Imp-3PDT at 25.00 to 29.00 EUR including VAT, with the price depending on the version chosen.
Sources (2)
- Imp - MIDI Mod - Oscillator Devices, Oscillator Devices, 2026-09-08
- Imp-3PDT, Oscillator Devices, 2026-07-21
