Synthesizer · Free for Windows

SEM-74

A classic expander voice from 1974, rebuilt in software, with a filter that sweeps from lowpass through notch to highpass.

Download for Windows0.13.0 · 60 MB What's new in 0.13.0

What it does

The voice

Two oscillators with saw and pulse and hard sync, a sub oscillator with noise, two envelopes, an LFO and drive.

The filter

A 12 dB state-variable filter that morphs from lowpass through notch to highpass, with a bandpass beside it.

Eight voices

Poly from two to eight voices, Mono and Legato with portamento, Unison with detune and spread, and Vintage: each voice a little its own.

Strata on the TV

Four effect slots with twenty-two effects, three modulators, MIDI sources, four macros and the Multi-Arp, on the console beside it.

Modulation

Drag a modulator onto any knob: envelopes, Functions you draw, Random, a voice modulator and a step sequencer.

Presets

Factory presets and banks, a browser with types and favourites, and undo with a history.

SEM-74 on the walnut bench under its lamp

Every part of it is modelled, lit and engraved in Blender before it's a plugin: what you see in your DAW is the instrument on this bench, and the knobs turn as these do.

Strata

Press STRATA and the camera turns to the TV beside the instrument. Strata is its console: the signal as a rail of tiles, four effect slots with twenty-two effects, three modulators, the MIDI sources, four macros and the Multi-Arp. Each effect's screen shows the sound, and you work it directly.

Strata on the TV: an effect's live screen with its controls beside it
Strata: a modulator drawn on its screen

What you need

  • Windows 10 or 11, 64-bit
  • VST3 plugin and a standalone app
  • A graphics card with OpenGL 3.2 or newer (any from the last ten years)
  • No account, no email, no copy protection

Installing

  1. Unzip it. Close your DAW.
  2. Copy the Valle SEM-74.vst3 folder into C:\Program Files\Common Files\VST3\ (Windows asks for administrator permission).
  3. Open your DAW and rescan plugins. In FL Studio: Options › Manage plugins › Find more plugins. It shows up as Valle SEM-74 by Valle Instruments.

Or run Valle SEM-74.exe on its own, no DAW needed. Updating: replace the old .vst3 folder with the new one; projects and presets keep working. Your presets live in Documents\Valle Instruments\SEM-74\.

Questions

Is it really free?

Yes. No account, no email, no trial. Download it and play.

I had OG SEM. Is this the same plugin?

Yes, under a new name. Delete the old "OG SEM.vst3" folder so it isn't listed twice; your projects open as before and your files move by themselves.

Download for Windows0.13.0 · 60 MB

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