Xaoc Budapeszt & Skopje: Stereo Spectral Processor & Quantizer

TL;DR: Xaoc Devices has announced two new Eurorack modules ahead of Superbooth 2026: Budapeszt, a stereo dual spectral processor built around comb-filter interference for experimental sound design, and Skopje, a 6HP dual quantizer with microSD card support and 100 banks of scales. The Budapeszt promises rich, evolving textures through cross-coupled feedback and internal modulation, while Skopje brings high-precision quantization with SCALA file support and independent channel calibration.

• Budapeszt is a stereo dual spectral processor using two independently tunable comb-type filters with six modes based on delay, phase, and filterbank approaches, plus dual triangle LFOs for internal modulation.
• Skopje is a 6HP dual quantizer with two independent channels, an OLED display for scale selection, microSD card storage, and support for both custom TXT files and SCALA tuning files.
• Budapeszt features multiple feedback paths including cross-coupled feedback and phase-inversion switches, enabling physical modeling, flanging, and chorus effects.
• Skopje offers glide, scale switching via trigger/CV, transposition (including unquantized for vibrato), and calibration per channel for VCO tracking issues.
• Both modules will debut at Superbooth 2026 (booth W355), with Skopje available in June 2026; pricing and Budapeszt availability to be announced.

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Budapeszt: The Spectral Sculptor

Let’s start with the module that made us spill coffee on our patch cables. Budapeszt is Xaoc Devices’ latest experiment in stereo signal processing, and it’s one of those rare modules that reads like a textbook on acoustic physics but sounds like a fever dream. At its heart: two independently tunable comb-type filters with six distinct modes spanning delay, phase, and filterbank approaches. If that sounds like a lot of math wrapped in metal, you’re not wrong — but the payoff is in the interference pattern.

The real magic, as Xaoc puts it, is in the “spectral lattice” formed by the overlap of two resonant structures. Think peaks and voids weaving together in real time, shaped by the relationship between channels rather than individual settings. Two triangle LFOs provide internal modulation (free, synced, and envelope follower modes included), so you can set it and forget it — or dive deep into CV control. Multiple feedback paths, including cross-coupled feedback between filters and phase-inversion switches, turn this into a sound design playground. We’re talking physical modeling, flanging, chorus, and textures that feel alive.

This isn’t a module for the faint of heart. Budapeszt rewards patience and a willingness to explore chaos. If you’ve ever spent an afternoon lost in comb filtering, you know how addictive that can be. We suspect this will be a favorite for those who think “clean” is a dirty word.

Skopje: The Quantizer That Actually Listens

On the other end of the spectrum, Skopje is a 6HP dual quantizer that feels like a Swiss Army knife for pitch control. Two independent channels, each capable of quantizing to a different scale from a different bank — up to 100 banks, each holding up to 100 scales. Selection happens via an OLED display with no menu diving, which is more than we can say for some flagship modules from other brands. The module stores everything on a microSD card, supporting both a simple custom TXT format and the ubiquitous SCALA files. Mix and match formats in one bank? Yes, please.

Beyond the basics, Skopje includes glide, scale switching via trigger or CV (perfect for compositional performance), and transposition with an unquantized option for vibrato. The A/D and D/A converters are high-precision, so you’re not losing fidelity in translation. And here’s the killer feature: each channel can be independently calibrated to compensate for VCO tracking issues. If you’ve ever wrestled with a temperamental oscillator, you’ll appreciate this more than a fresh bag of beans.

Skopje is the kind of tool that makes you wonder why other quantizers don’t do this out of the box. It’s practical, flexible, and designed for people who actually use their rack for composition, not just wiggling.

Key Specs and Practical Details

Budapeszt is a stereo dual spectral processor built around two comb-type filters with six modes each, dual triangle LFOs (free, synced, envelope follower), and multiple feedback paths including cross-coupled feedback and phase-inversion switches. It’s designed for experimental stereo processing, from subtle shimmer to full-on chaos. Skopje is a 6HP dual quantizer with two independent channels, 100 banks of up to 100 scales each, microSD card storage, OLED display, and support for custom TXT and SCALA files. It also features glide, trigger/CV scale switching, transposition (including unquantized for vibrato), and per-channel calibration.

Both modules will be on display at Superbooth 2026 at booth W355. Skopje will be available in June 2026. Pricing and Budapeszt availability are still TBA, but Xaoc typically lands in the mid-range for build quality and feature set. We’ll update as soon as we hear more.

Who Should Care

Budapeszt is for sound designers who want to push beyond standard filters. If you’re into granular synthesis, physical modeling, or just making your patches sound like they’re breathing, this is your module. Skopje is for composers and performers who need reliable, flexible quantization without menu diving. It’s also a godsend for those with vintage or DIY oscillators that need calibration.

Together, they represent two sides of Xaoc’s personality: one experimental and deep, the other practical and precise. Both are welcome additions to any rack that values quality over quantity. We’ll be at Superbooth with a thermos full of coffee, ready to hear Budapeszt in action. Bring earplugs — or don’t.

I’ll be at Superbooth with a notebook full of caffeine stains and a burning need to hear Budapeszt scream. If you see me, ask about my favourite comb filter preset — it’s a secret, but I might share it for a good espresso.