SQ8L: Free Ensoniq SQ-80 Emulation, Back in 64-Bit
Here is a good one for the synthwave and industrial crowd. SQ8L is a free emulation of the Ensoniq SQ-80, the 1988 hybrid synth that mixed gritty 8-bit digital waveforms with a warm analog filter. The original hardware is one of those machines that shows up everywhere once you know what to listen for, from 80s film scores to modern synthwave and industrial tracks, and originals are getting harder to find in good shape.
The SQ-80 was the big brother of the ESQ-1. Eight voices, three digital oscillators per voice, a resonant analog filter built on the CEM3379 chip, four LFOs, four envelopes, and a built in sequencer. The sound is that weird Ensoniq thing: glassy digital waveforms run through an analog filter, so you get keys and pads that are both cold and warm at the same time. It is brilliant for basses too, the kind of thick low end that sits right in a mix.
The story here is almost as good as the synth. Siegfried Kullmann wrote the original SQ8L plugin back in 2006, and it was 32-bit Windows only, so it has been stuck outside modern DAWs for years. A revival team just rebuilt it from the original binary, and they verified it is bit exact against the original plugin, same samples out for all 168 factory programs. Now it runs as a 64-bit plugin on Windows, Mac, and Linux, in VST2, VST3, AU, CLAP, and LV2 formats. The editor zooms from 100 to 300 percent, you can push polyphony up to 64 voices, and it still loads real SQ-80 and ESQ-1 SysEx patches and old SQ8L banks.
One honest note: the new 64-bit build is still in beta, and Mac users need to clear the quarantine flag in Terminal because the plugins are not notarized by Apple. It also does not support sample rates below 44.1 kHz, same as the original. Small stuff for a free synth that sounds this good.
Download it free here: https://github.com/sq8l-revival/SQ8L/releases
It is completely free, no sign up and no demo limits. Grab the archive for your system from the releases page.
How to install it:
Windows: download the Windows archive, unzip it, and copy the VST2 or VST3 file into your DAW's plugin folder. Then rescan plugins in your DAW and it will show up as SQ8L.
Mac: download the macOS archive and copy the VST3 or AU file into your plug-ins folder (Library/Audio/Plug-Ins). Because the plugins are not notarized, you need to remove the quarantine flag in Terminal first, following the instructions on the project page, then rescan in your DAW.
Linux: download the Linux archive and copy the VST3, CLAP, or LV2 file into your plugin folder, then rescan.
Hear the plugin in action:
That video walks through the SQ8L plugin itself, presets and sound design, so you can hear what the SQ-80 engine does before you download. Load up a pad, detune those oscillators a touch, and let me know what you make with it.
