Bastl Citadel Wave Bard — Dual Personality Flip-Panel Module: Wave Bard Stereo Sample Player & FX Wizard Nine-Mode Multi-FX. Two Modules for One!
The CITADEL is a Eurorack reimagining of the popular Kastle 2 semi-modular desktop device, offering two distinct creative tools in a single 16HP module. Flip the reversible front panel to choose between WAVE BARD (stereo sample player) or FX WIZARD (multi-effects processor) — switching is a rather seamless affair with the custom tool that comes included. Once flipped, swap the firmware to turn it into the other module.
Comes pre-assembled as the Wave Bard (Flip the frontplate to turn it into the FX Wizard).
First, the Wave Bard Side — don’t make beats, let them naturally emerge! This experimental stereo sample player is a semi-autonomous companion that keeps surprising you with fresh ideas. Get instant inspiration from the carefully crafted factory sound bank by Oliver Torr, or load your own samples via the web-based app.
Play melodic samples in quantized scales, sequence groovy off-grid beats with the built-in pattern generator and LFO, or reverse sounds with the unique reversing envelope. The LENGTH knob controls both decay and attack — turn it left to reverse samples and add attack time. Built-in filter, delay, and chorus/flanger effects add extra sonic spice.
Second, the FX Wizard Side — Explore the limits of sound processing through modulation and modularity. Choose from 9 stereo effects across three families: DELAY (delay, flanger, freezer), AMPLITUDE (panner, crusher, slicer), and PITCH-SHIFTING (pitcher, replayer, shifter). Instead of navigating presets, craft unique effects with dynamic behavior using modulation from the LFO, pattern generator, or envelope follower.
Citadel packs a whole lot into its dual nature: stereo headphone output, TRS MIDI input, tempo generator with divider/multiplier, USB MIDI (from the back), stereo mixing, integrated LFO and pattern generator. It comes with a full 3.5mm patch bay and added switches for hands-on pattern control — perfect for smaller and beginner systems while earning its place in larger setups.
Load different Citadel/Kastle 2 firmwares and updates via USB-C on the back of the module.
Quirky, unusual, cool, and you get two really interesting modules for the price of one!
Features:
- Reversible front panel: Wave Bard (stereo sample player) / FX Wizard (stereo multi-FX)
- Built-in pattern generator (tempo-synced) with CV & Gate outs; tap tempo, divider, external clock
- LFO with reset, triangle/pulse outs, attenuverting modulation
- Wave Bard: multi-bank sample playback, quantized NOTE input & user scales, reverse/length envelope, filter + delay/chorus; web app for loading samples, rhythms, and scales
- Factory banks by Oliver Torr; user content via USB/web app
- FX Wizard: 9 effects (delay, flanger, freezer, panner, crusher, slicer, pitcher, replayer, shifter) with filter in feedback, stereo width, mode CV, and envelope follower
- MIDI inside: TRS MIDI in (clock/notes/CC), USB-MIDI I/O on rear
- Stereo DC-coupled I/O, input gain, dedicated headphone output
- 16HP, skiff-friendly depth, low current draw; firmware updates via USB
| U | 3 |
| HP | 16 |
| Depth | 24 |
| +12V | 90 |
| –12V | 20 |







