WMD Gamma Wave Source: 8-Voice Polyphonic Wavetable Synth Module

TL;DR: WMD resurrects the Gamma Wave Source as a polyphonic 8-voice wavetable synth voice module, developed with Infrasonic Audio’s Nick, adding MIDI, ART, and modern wavetable support. Alongside, two new 4HP channel-processing modules — Channel Surfer and Bus Rider — extend the Performance Mixer MKII ecosystem. Gamma Wave Source is a prototype with price/date TBA; the other two are available for pre-order at $299 each.

• Gamma Wave Source evolves from a dual oscillator into a full polyphonic synth voice with 8 voices, dual wavetables (X/Y), per-voice filter, three ADSRs, and sub-oscillator.
• Wavetable compatibility is expanded: supports Wave Edit wavetables (256 samples/cycle) and higher-resolution formats (2048 samples) from soft synths like Serum and Pigments.
• Channel Surfer (4HP) is a channel strip with 3-band EQ, dual filters, overdrive, and multi-FX (dub delay, chorus, ducking), usable standalone or via Performance Mixer MKII insert header.
• Bus Rider (4HP) is a stereo multiband EQ/dynamics processor with three-band isolator EQ and lookahead limiter, aimed at on-the-fly mastering or submix processing.
• Both new modules save current states and recall presets; Gamma Wave Source is a prototype with price/availability TBA, while Channel Surfer and Bus Rider ship in 3-4 months.

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Gamma Wave Source Returns as Polyphonic Synth Voice

Superbooth 2026 may have left the building, but the news keeps trickling in like the last dregs of a cold pour-over. WMD, the Colorado-based mad scientists of Eurorack, have resurrected the Gamma Wave Source — originally a dual wavetable oscillator from 2012 — and turned it into something far more ambitious. This isn’t a simple reissue; it’s a full-blown polyphonic synth voice in a module, developed in collaboration with Nick from Infrasonic Audio (the same wizard behind the beloved WMD/SSF line).

The new Gamma Wave Source is an 8-voice polyphonic wavetable synthesizer with MIDI, ART (Tiptop Audio’s protocol), and standard 1v/oct/gate support. That’s right: you can play chords, not just angry monosynth leads. It’s a clear pivot from the original’s oscillator-only philosophy into a complete voice architecture. We at Noxal appreciate a company that doesn’t just slap new paint on old hardware but rethinks the whole platform. The module features a main encoder, shortcut buttons, and a retro-looking display that, I confess, gives me strong KITT Knight Rider vibes. I half-expect it to talk back.

Wavetables, Filters, and Modulation Under the Hood

Under the hood, the Gamma Wave Source packs two wavetable oscillators (X and Y) with built-in modifiers like phase modulation and interpolation. According to Nick, it supports Wave Edit wavetables at 256 samples per cycle and higher-resolution formats up to 2048 samples from soft synths like Pigments and Serum. This is a big deal for wavetable nerds: you can now load your Serum wavetables directly into hardware without sacrificing resolution. There’s also an adjustable sub-oscillator with its own front-panel control and output — because every good patch needs a little bottom end.

Each voice gets its own filter with built-in drive and morphable outputs, plus three ADSR envelopes with hands-on slider control. That’s a lot of physical control for a wavetable module, which typically hides envelope settings behind menus. Modulation-wise, you have plenty of flexibility without losing the tactile immediacy that makes hardware worth owning. We’ve seen too many modules bury essential parameters in sub-menus — WMD seems to have avoided that trap here.

Channel Surfer and Bus Rider: The Mixer Upgrades

Alongside the Gamma Wave Source, WMD unveiled two new 4HP processing modules that feel purpose-built for anyone who owns their Performance Mixer MKII — or anyone who simply wants clean signal processing in a small footprint. The Channel Surfer (CHNL SRFR) is a channel strip module that connects to the Performance Mixer MKII via its insert header, or works as an independent mono/stereo unit. It offers a 3-band EQ with low shelf, high shelf, and a mid bump — all with adjustable frequencies via a shift button press.

But the real fun is the independent lowpass and highpass filters, each with adjustable resonance, plus an overdrive circuit for extra character. On top of that, there’s a multi-FX processor with dub delay, chorus, and ducking — with Nick hinting that more FX types will be developed. The Bus Rider is its stereo counterpart: a multiband EQ/dynamics processor with a three-band isolator EQ and a lookahead limiter, designed for on-the-fly mastering at the end of your chain. Both modules save current states and recall presets, which is essential for live performance. At $299 each, they’re not cheap, but they’re cheaper than replacing your whole mixer.

Market Context and Who Should Care

WMD is threading a needle here: the Gamma Wave Source competes in a space crowded by modules like the E370 Quad Morphing Wavetable VCO and the Intellijel Shapeshifter, but its polyphonic voice architecture and soft-synth wavetable compatibility set it apart. The Channel Surfer and Bus Rider are clearly aimed at existing Performance Mixer MKII owners, but they also work as standalone units for anyone building a compact processing chain.

Who should care? If you’re a wavetable enthusiast who wants hardware that doesn’t require a computer to be interesting, the Gamma Wave Source looks like a serious contender. If you’re a live performer who needs quick, tactile control over EQ and dynamics — especially if you already own WMD’s mixer — the new 4HP modules are a no-brainer. For everyone else, these are worth watching. WMD rarely misses, and this trio shows they’re still thinking hard about what modular musicians actually need.

I’ll be honest: I’m already saving for the Gamma Wave Source, and I have no idea where I’ll put it in my rack. But that’s never stopped me before — especially not when there’s fresh coffee in the mug and a new wavetable to load at 2 AM.