Uploaded January 2026 | Updated September 2026, 2 days ago

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We built a fantasy world of magical music machines with the FX Wizard multi-effect, the Wave Bard sample player and the Alchemist synth that live in battery powered Kastle 2 format and the Citadel eurorack version. We are excited to not only announce the late arrival of the Citadel Alchemist Eurorack module to the party, but to let everyone know that all the instruments are now available as DIY kits and that we are partially open-sourcing it so the world we started could be expanded by many others.

Buy Citadel Alchemist here:
shop.bastl-instruments.com/eurorack/citadel-alchemist.html

Citadel Alchemist Synth Modes Preview:
youtu.be/Q--LZdA7-7k

Everything about the Kastle 2/Citadel Open sourcing:
github.com/bastl-instruments/kastle2

Buy Kastle 2 / Citadel DIY Kits and Faceplates here:
shop.bastl-instruments.com/diy

3D Clip by Matteo Ruggiero
instagram.com/sxilence6

Sound Demos by Václav Peloušek @ToyotaVangelis


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