Bastl Déjà Vu: The 4HP “Swiss Army Knife” for Your Eurorack
In the world of Eurorack, space is the ultimate currency. Finding a module that can wear multiple hats without hogging your precious rail space is like finding gold. Enter the Bastl Déjà Vu, a compact 4HP utility powerhouse that proves big things really do come in small, fader-equipped packages.
Whether you need a simple attenuator, a performance-ready crossfader, or a low-noise preamp to bring external gear into your rack, the Déjà Vu is designed to be the versatile workhorse you’ll find yourself reaching for in every patch.
More Than Just a Fader
At its core, the Déjà Vu features two identical channels (A and B), each centered around a smooth, tactile fader. But don’t let the simple interface fool you. Behind those sliders lies a sophisticated signal path capable of handling both audio and CV with equal finesse.
The brilliance of the module lies in its flexibility. Each channel features a mode switch that toggles between Attenuator, Attenuverter, and Crossfader modes. Need to subtly scale a modulation source? Flip to attenuator. Want to invert an envelope? Switch to attenuverter. Looking to blend between two waveforms for a morphing lead? The crossfade mode has you covered.
A Master of Transformation
One of the standout features is the dedicated Fader Gain switch. This allows you to boost signals by 1x, 2x, or even 10x. This high-gain setting acts as a high-quality, low-noise pre-amp, making it remarkably easy to bring line-level signals (like your favorite drum machine or phone) up to beefy Eurorack levels.
Furthermore, the module is “smart” about its connectivity. If you leave the output of Channel A unplugged, it automatically mixes into Channel B. This internal normaling allows the Déjà Vu to function as a compact 4-channel mixer—perfect for summing sub-mixes or creating complex modulation chains.
Key Features
- Dual-Channel Control: Two independent fader-based channels for audio or CV.
- Three Mode Operation: Easily switch between Attenuator, Attenuverter, and Crossfader.
- Powerful Boosting: Selectable gain (1x, 2x, 10x) for signal amplification and line-to-modular conversion.
- Internal Mixing: Cascading outputs allow for 4-channel mixing (can be disabled via jumper).
- Visual Feedback: Bi-color LED indicators (Green/Red) provide instant feedback on voltage polarity and signal levels.
- Expandable: Chainable with other units via back jumpers for even larger mixing setups.
- Perfect Companion: Specifically designed to complement the Bastl Neo Trinity but fits perfectly in any setup.
Pricing
The Bastl Déjà Vu is competitively priced for a multi-functional utility, offering immense value per HP.
| Currency | Estimated Price* |
| EUR | €138.00 (ex. Tax) |
| USD | ~$163.00 |
| GBP | ~£118.00 |
| AUD | ~$250.00 |
*Prices are approximate based on current exchange rates and regional distributor listings. Tax/VAT may vary by location.
Product Summary Table
| Specification | Details |
| Manufacturer | Bastl Instruments |
| Module Type | Voltage Processor / Utility / Mixer |
| Width | 4 HP |
| Depth | 30 mm |
| Current Draw | +12V: 60mA / -12V: 60mA |
| Inputs | 2x Fader In, 2x Add In |
| Outputs | 2x DC Coupled Out |
| Gain Options | 1x, 2x, 10x (Configurable to 5x) |
| Best For | Mixing, Attenuation, Level Boosting, Performance Control |
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