Matt Johnson’s Keyspace dives headfirst into the DSI Tempest, a drum machine that’s half analog beast, half digital enigma, and all attitude. If you’re after pristine samples and instant gratification, keep scrolling. But if you like your beats dirty, your menus deep, and your synths with a side of chaos, this one’s for you. Matt’s approach is hands-on, honest, and just a little bit ruthless – exactly what we want when someone’s wrangling a machine that’s as much puzzle as instrument. Strap in for a ride through sound design rabbit holes, brutal compressors, and the kind of hybrid grooves that make your DAW jealous.

9. February 2026
SPARKY
Matt Johnson’s Keyspace vs. The DSI Tempest: Analog Mayhem or Menu Madness?
Hybrid Heart: Analog and Digital in a Boxing Match
Matt Johnson’s Keyspace doesn’t waste time with pleasantries – straight into the ring with the DSI Tempest, a machine that fuses analog and digital synthesis like a rave in a scrapyard. Two analog oscillators, two digital, and a filter setup that’ll make your modular jealous. You get saws, triangles, pulses, and a sub, all ready to be mangled.
The digital side throws in a heap of drum and keyboard samples, but don’t expect hi-fi luxury – these are gritty, low-memory sounds that ooze character. Sure, you can’t load your own samples (boo), but the blend of analog warmth and digital filth means you’re never short of weirdness. It’s a playground for anyone who likes their beats a bit mutant.

"It's a bit of an enigma. You know, it can sound really glorious. It's a bit of a rabbit hole, you can spend hours and kind of enjoy messing around with it and you can get in real deep with it."
© Screenshot/Quote: Mattjohnsonskeyspace (YouTube)
Menu Diving and Sample Grit: The Tempest’s Double-Edged Sword

"They're kind of grungy because they were so stingy on the memory on this thing that they're just tiny, tiny amounts of memory."
© Screenshot/Quote: Mattjohnsonskeyspace (YouTube)
Here’s where the Tempest shows its teeth. The sample quality? Let’s just say it’s more street food than fine dining – lo-fi, crusty, and unapologetically raw. Push those digital oscillators high and you’ll get artifacts that could start a toaster-fight. But that’s part of the charm, if you’re into that sort of thing.
Usability? Well, hope you like menus. There’s depth, but you’ll be clicking and scrolling more than you’d like. Modulation options are solid – two LFOs, four envelopes, a mod matrix – but getting there is a bit of a faff. The Tempest rewards patience and punishes the lazy. If you want instant gratification, look elsewhere.
Studio Lab Rat or Stage Weapon?
Matt doesn’t just talk theory – he shows how the Tempest fits into both live and studio setups. Drum programming is flexible, letting you stack analog and digital layers for hybrid kicks that punch through any mix. Analog claps, 808 samples, and synth lines all get their moment, with panning, tuning, and modulation ready to be abused.
Performance features like 16 tunings, assignable sliders, and real-time event tweaking mean you can warp beats on the fly. Sure, some of it’s bonkers and maybe not for every track, but the creative potential is massive. This isn’t just a studio ornament – it’s a proper street weapon if you’re willing to put in the hours.
Sound Design Playground: Hear It to Believe It
Throughout the video, Matt drops a barrage of sound demos – from warm analog grooves to glitchy, experimental textures. The Tempest shines brightest when pushed into weird territory: tiny clicks, distorted rolls, and hybrid tones that you won’t get from your average drum box. Honestly, words don’t do it justice – you’ll want to hear the madness for yourself.

"I think where this thing does really excel is making experimental kind of sounds."
© Screenshot/Quote: Mattjohnsonskeyspace (YouTube)
Is It Worth It? The Verdict from the Bunker
So, does the Tempest earn its keep or is it destined for the gear graveyard? Matt’s torn – the analog sounds are lush, the hybrid tricks are unique, but the workflow can be a headache. Six-note polyphony means note stealing is real, and the lack of sample import is a missed opportunity. Still, there’s a warmth and unpredictability here that modern drum machines just can’t fake.
If you want clean, clinical beats, the Tempest isn’t for you. But if you crave character, chaos, and a bit of a fight, this box might just be your new best mate. Just don’t expect it to make things easy – and be prepared to get your hands dirty.
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