Side AYour computer
The plugin
VST3 & AU · Mac
- The newest version
- Download it, drag it into your plugins folder, play
- No extra software, no account
The Osc Collection
DEM‑Osc
She’s free. Now she just plays.
Five tape-warm oscillators, four convolution spaces, and twenty-five presets that already sound finished. A native synth for your DAW.
Instant download · Mac · VST3 · AU · On Windows? Get it in Kontakt
Runs in the free Kontakt Player · Mac & Windows · On a Mac? Get the plugin
On your phone? Same button. Check out free and we’ll email you the download link, so it’s waiting when you’re back at your computer.
- Free, no time limit
- Free to keep, no timer
- 25 presets that already sound finished
Tap the tape
One synth.
Wildly different voices.
Six sounds, straight out of DEM-Osc — sub bass, glassy pad, electric keys, singing lead, lush strings, bright brass. Tap the cassette to cycle, or pick one:
Tap a sound. It streams, nothing to download.
What’s under the tape
Five vintage oscillators,
one free plugin.
DEM-Osc takes one oscillator from each synth in our Osc Collection — saw, triangle, square, sync and chip — and stacks three at a time through four hand-built convolution spaces. Detune them, let each voice drift, and they melt into something warm and alive.
- 5Oscillators
- 5Wave shapes
- 4Reverb spaces
- 25Presets
No menus. No manual.
An instrument, not a settings page.
Turn a knob, hear it move. Glide between notes, add a little vibrato, ride the mod wheel, let each voice slip just out of tune. It’s built to be played, not configured.
- Key glide
- Vibrato
- Mod-wheel routing
- Per-voice drift
- Convolution reverb
- Convolution FX
Two ways to play it
Both free.
Pick your setup.
The plugin is the newest DEM-Osc, made for Mac. The Kontakt version is the original, and it runs on Windows too, in the same free player as the rest of the Osc Collection.
Side BYour computer
In Kontakt
Kontakt Player · Mac & Windows
- The original version
- Runs in the free Kontakt Player
- Add it in Native Access with the serial we email you
Frequently asked
Before you download.
Is DEM-Osc really free?
Yes. It’s yours to keep, with no trial and no timer. A few of the deeper effects are saved for the paid Osc Collection, and DEM-Osc is the free way in.
What formats and OS does it support?
There are two versions, and both are free. The plugin is VST3 and AU for macOS. The Kontakt version runs in the free Kontakt Player on Mac and Windows, and you add it in Native Access with the serial we email you.
What’s inside?
Five vintage oscillators sampled from real hardware, four convolution reverb spaces, and 25 handcrafted presets — with glide, vibrato, and mod-wheel routing.
Free today. Yours forever.
Download it, load a preset, and lose an afternoon.
When you want the other four oscillators, you’ll know where we live.
The Mac plugin · adds to your cart, just add email & check out · On Windows? Get it in Kontakt · or explore the full Osc Collection
The Kontakt version · Mac & Windows · adds to your cart, just add email & check out · On a Mac? Get the plugin · or explore the full Osc Collection
DEM-Osc is made by Clay and Kelsy Instruments — our cute little software company. We build the instruments and the tools we need to keep producing music. Our music has been streamed over 2 million times, and our instruments downloaded over 10,000 times.