Do I need Kontakt to use the Osc synths?

Yes — the five Osc synths are Kontakt instruments. They run in Kontakt 6 or later, and the free Kontakt Player works; you don’t need the full version. They install through Native Access.

Can I hear the synths before I buy?

Yes. Every synth card on the plugins page has a play button that streams a real demo, and each press plays the next one.

What’s in the Osc Collection, and how much do I save?

All five synths — Pro-Osc, Chip-Osc, JX-Osc, Digi-Osc and Moo-Osc — for $99 instead of $145 bought separately: 90 wave sets, 150 impulse responses and 410 presets.

Is DEM-Osc really free?

Yes — the whole plugin, free forever, no time limit. It goes through a free checkout so we can email it to you. It’s a native VST3/AU plugin for Mac and Windows.

Clay and Kelsy — a music duo and instrument designers in Los Angeles. Woman-owned, queer-owned, and the same two people who read every email.

everything we make

Plugins

Every instrument and effect we make, in one place — five synths for Kontakt, a free native plugin, and what’s next. Press play on any of them.

Instrumentssynths for Kontakt 6+ · free Player

Pro-Osc

synth · Kontakt

The room-filling analog. Raw oscillators sampled from a vintage analog synth, Curtis-filtered and warm — leads, basses, pads, keys and brass, all performable from the mod wheel.

14 waves · 30 IRs · 83 presets

$29

learn more →[add to cart]

Chip-Osc

synth · Kontakt

Byte-sized, then eerie. Built from the raw oscillators of a digital hybrid synth — bright, classic chiptune all the way to deep, dark cinematic soundscapes.

20 waves · 30 IRs · 81 presets

$29

learn more →[add to cart]

JX-Osc

synth · Kontakt

Your 80s sci-fi sidekick. Sampled from an 80s-era analog synth — lush strings, brass and pads that beam you straight into your favorite sci-fi soundtrack.

12 waves · 30 IRs · 81 presets

$29

learn more →[add to cart]

Digi-Osc

synth · Kontakt

A pixel-perfect playground. Raw oscillators from three digital synths and eurorack modules — bright, beautiful and electronic, a treasure trove for melodies.

22 waves · 30 IRs · 81 presets

$29

learn more →[add to cart]

Moo-Osc

synth · Kontakt

Utterly rich and creamy. Heavy, rich and creamy with no filler — funky basses and timeless leads that instantly elevate a track.

22 waves · 30 IRs · 84 presets

$29

learn more →[add to cart]

The Osc synths run in Kontakt 6 or later — the free Kontakt Player works — and install through Native Access. First time? Install guide & FAQ →

The Collectionall five, one price

The Osc Collection

bundle · 5 synths

All five synths for Kontakt, one bundle. Pro-Osc, Chip-Osc, JX-Osc, Digi-Osc and Moo-Osc — sampled from real vintage, digital and eurorack gear, built and finished by the two of us.

5 synths · 90 waves · 150 IRs · 410 presets

$99~~$145~~save $46

learn more →[add all five]

Appsfor iPhone

in the works

clay & kelsy · for iPhone

Songwriting by Clay and Kelsy

A writer’s looper for iPhone. Feel a tempo, put the idea down, and it’s already looping. Stack your layers, write the words, hit export. One sitting, one app.

Feel a tempoPut it downStack layersWrite the words

coming soon · iOS

coming soon

about the app →[notify me]

Freeno strings

DEM-Osc

free · VST3 / AU

A free taste of all five. One oscillator from each of the five synths under one roof — a native VST3/AU plugin for Mac and Windows. The easiest way to hear where the collection goes.

5 waves · 4 IRs · 25 presets

Free

learn more →[get it free]

Free things

kontakt · free

Five instruments we gave away. A market gong, our most-used 808, a one-string cigar-box guitar two ways, and a set of ringing wrenches — real instruments we sampled, free forever.

Kontakt 6+ (full version) · direct downloads

Free

[take one]

FIVE DISTINCT PERSONALITIES

Find your kind of strange.

Swipe across to compare specs and listen →

Instrument	Character	Waves	IRs	Presets	Price	Listen
The Osc Collection ↗All 5 synths	All five together$145 separately · save $46	90	150	410	$99	Get all five ↗
Pro-Osc ↗	Warm analog · Curtis-filtered	14	30	83	$29
Chip-Osc ↗	Digital hybrid · Chiptune to cinematic	20	30	81	$29
JX-Osc ↗	80s analog · Strings, brass, pads	12	30	81	$29
Digi-Osc ↗	Digital + eurorack · Bright and electronic	22	30	81	$29
Moo-Osc ↗	Rich and creamy · Basses and leads	22	30	84	$29

All five work in Kontakt 6+ and the free Kontakt Player. Install through Native Access.

Plugins by Clay and Kelsy Instruments — synths for Kontakt, a free plugin, and Songwriting by Clay and Kelsy for iPhone

Clay and Kelsy Instruments is a woman-owned, queer-owned instrument company in Los Angeles. We make the Osc Collection — five synths for Kontakt, each sampled from real vintage, digital and eurorack gear — the free DEM-Osc plugin (VST3 and AU for Mac and Windows), and Songwriting by Clay and Kelsy, a writer’s looper for iPhone. Every synth on this page has a play button, so you can hear it before you buy.

The instruments

Pro-Osc — the room-filling analog. Raw oscillators sampled from a vintage analog synth, Curtis-filtered and warm. 14 waves, 30 impulse responses, 83 presets. $29, for Kontakt.
Chip-Osc — byte-sized, then eerie. A digital hybrid synth, from bright chiptune to dark cinematic soundscapes. 20 waves, 30 impulse responses, 81 presets. $29, for Kontakt.
JX-Osc — your 80s sci-fi sidekick. Lush strings, brass and pads from an 80s-era analog synth. 12 waves, 30 impulse responses, 81 presets. $29, for Kontakt.
Digi-Osc — a pixel-perfect playground. Three digital synths and eurorack modules. 22 waves, 30 impulse responses, 81 presets. $29, for Kontakt.
Moo-Osc — utterly rich and creamy. Funky basses and timeless leads. 22 waves, 30 impulse responses, 84 presets. $29, for Kontakt.
The Osc Collection — all five synths for Kontakt in one bundle: 90 wave sets, 150 impulse responses, 410 presets. $99 (was $145).
DEM-Osc — free. One oscillator from each of the five synths, as a native VST3/AU plugin for Mac and Windows. 5 waves, 4 impulse responses, 25 presets.
Songwriting by Clay and Kelsy, a writer’s looper for iPhone. Feel a tempo, put the idea down, and it’s already looping. Coming soon.
Free things — five free Kontakt instruments we sampled ourselves: aGong, gr808 kick, Diddley ebow, Diddley plucks and Wrenches.

Requirements

The Osc synths run in Kontakt 6 or later — the free Kontakt Player works — and install through Native Access. DEM-Osc is a native VST3/AU plugin for macOS and Windows and runs on its own inside your DAW. Songwriting by Clay and Kelsy is an iPhone app. If you get stuck, our install guide and FAQ walks through every step, and replying to any email from us reaches the two of us directly.

Frequently asked

Do I need Kontakt to use the Osc synths?: Yes — the five Osc synths are Kontakt instruments. They run in Kontakt 6 or later, and the free Kontakt Player works; you don’t need the full version. They install through Native Access.
Can I hear the synths before I buy?: Yes. Every synth card on the plugins page has a play button that streams a real demo, and each press plays the next one — so you can hear a lead, a bass, a pluck and a pad from each instrument.
What’s in the Osc Collection, and how much do I save?: All five synths — Pro-Osc, Chip-Osc, JX-Osc, Digi-Osc and Moo-Osc — for $99 instead of $145 bought separately. Together that’s 90 wave sets, 150 impulse responses and 410 presets.
Is DEM-Osc really free?: Yes — the whole plugin, free forever, no time limit. It goes through a free checkout so we can email it to you. It’s a native VST3/AU plugin for Mac and Windows.
What is Songwriting by Clay and Kelsy?: Songwriting by Clay and Kelsy is our writer’s looper for iPhone: feel a tempo, put the idea down, and it’s already looping. Stack layers, write the words, fill in the chords and export. It’s coming soon. Join the list on its page to hear first.
Who makes these?: Clay and Kelsy — a music duo and instrument designers in Los Angeles. Woman-owned, queer-owned, and the same two people who read every email.