OXI Instruments, the Spanish purveyors of hands-on sequencing and modular integration, take us on a haunted journey through their Halloween Special. In this video, they build a retro-inspired horror synth track from scratch, deploying the OXI One sequencer, Coral polyphonic module, and Meta effects to weave eerie arpeggios and chilling atmospheres. The focus is on modular workflow: how each device slots into the patch, how sounds are layered and sculpted, and how the whole system comes together for a spooky, performance-ready result. If you’re curious about how these modules interact in a real-world creative session, this is a treat (with only a few tricks).

31. October 2024
MILES
OXI Instruments Conjure a Modular Halloween: Sequencing Spooks with OXI One, Coral & Meta
Summoning the Modular Spirits: Halloween Setup
The video opens with OXI Instruments inviting viewers into a Halloween-themed session, promising a track built entirely from scratch using their flagship modules: OXI One, Coral, and Meta. The creator wastes no time, resetting the Coral module to ensure a clean slate and then mapping out the intended roles for each sequencer track on the OXI One. Track 1 is set for chords, track 2 for bass, track 3 for mono lead duties, and track 4 for drums—each mapped to the Coral for tight integration.
This modular approach underlines OXI’s philosophy of making their hardware the central nervous system of a hybrid setup. The workflow is immediately hands-on, with the creator demonstrating how quickly the OXI One can be configured to control multiple voices and parts. It’s a methodical start, but one that sets the stage for a patch that’s both flexible and deeply interconnected—a hallmark of OXI’s design ethos.

"to create something that has a sort of a retro horror synth wave flavor."
© Screenshot/Quote: Oxiinstruments (YouTube)
Layering Fear: Arpeggios, Drums & the Retro Horror Palette

"We can use this other one, for example, with some filtering."
© Screenshot/Quote: Oxiinstruments (YouTube)
With the groundwork laid, the creator dives into building the bass, cycling through Coral’s engines until a suitably menacing sound emerges. The bass sequence is dropped an octave and made snappier, setting the foundation for the track’s ominous vibe. Drums are then constructed step by step: a classic four-on-the-floor kick, a snare with adjustable velocity, and hi-hats—each voice individually selected and tweaked within Coral’s drum engines.
The modular choreography continues as the Meta module is clocked and brought into play, adding delay and filtering to the evolving groove. The lead is next, with a sound chosen for its organ-like, spooky character, further cementing the retro horror aesthetic. Throughout, the process is methodical but creative, with each element layered and refined in real time, showing how the modules can be orchestrated for maximum effect.
Chords are introduced to thicken the arrangement, with the creator selecting and saving different voicings on the fly. The workflow is a showcase of step-by-step sound design, where each layer—bass, drums, lead, chords—builds towards a cohesive, spine-tingling synthwave track. The modular integration is seamless, and the video highlights how these devices can be used to construct a full arrangement without ever leaving the hardware.
OXI One: The Sequencing Brain & Coral’s Polyphonic Power
The OXI One takes centre stage as the sequencing hub, deftly managing multiple tracks for bass, leads, and drums. Its ability to assign different modes and MIDI channels to each track allows for granular control over the Coral’s voices. Track 1’s chord mode is kept on MIDI channel 1 for polyphonic duties, while tracks 2 and 3 handle mono bass and lead parts, and track 4 is set up as a multi-track drum sequencer, each row mapped to a separate Coral drum voice.
Coral’s polyphonic capabilities are put to work for rich chord sequences, with the module handling up to eight voices and allowing for big, lush harmonies. The video demonstrates how keeping polyphonic parts on a single MIDI channel simplifies setup, and how each sequencer track can be routed to its own Coral part. This division of labour between sequencer and sound module is classic modular thinking—assign, patch, and play.
Refining the Haunt: Effects, Modulation & Sonic Polish
With the skeleton of the track in place, attention turns to refining the sounds. Effects like chorus and reverb are dialled in via Coral’s secondary functions, adding depth and shimmer to the bass, snare, hats, and lead. The creator demonstrates how easy it is to access these effects, using the encoder to navigate and apply modulation, space, and even noise to individual parts.
This section is a practical masterclass in sound sculpting: snare drums get reverb for extra space, hats are treated with noise and panning, and leads are thickened with chorus and additional effects. The modular workflow shines here, as each tweak is made in real time, showing how the modules can be adjusted to enhance the track’s haunting atmosphere. The result is a mix that’s both eerie and polished, ready for any synthwave séance.
Saving the Patch: Recall & Creative Continuity
As the session wraps up, the creator demonstrates the importance of saving both the OXI One and Coral setups. With a quick combination of shift and save on the sequencer, and a two-step process on the Coral, all voices, parts, and effects are stored for instant recall. This approach ensures that the carefully crafted sounds and arrangements can be revisited or further developed, making the workflow not just creative but also practical for future sessions.

"you can do very easily by pressing shift and the save button."
© Screenshot/Quote: Oxiinstruments (YouTube)
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