THETISSYNTH

Download

Thetis was called Nebula until November 2026. This release's installer and plug-in are still labelled Nebula; the name changes inside the plug-in with the next version, and your presets and trial carry over.

Enter your email and we send the trial code and download link straight away. Each download is the full plug-in with a 14-day trial. The same installer becomes the full version when you enter a licence key, so there is nothing to reinstall. One installer each puts the Audio Unit, the VST3 and a standalone app in the right places. macOS 12 or later, Apple silicon and Intel.

Which trial?

We email you a trial code and the download link. The plug-in asks for the email and code the first time it opens, and tells us when it is used so we can see how the trial is going. No newsletter, no sharing. Privacy.

Nebula Orchestra pack

Real recorded instruments for Thetis: an upright piano, timpani, an orchestral percussion kit with bass drum, snares, cymbals and more, glockenspiel, tubular bells, marimba, harp, string sections, horns, trumpets, trombones, tuba, flute, oboe, clarinet, bassoon and a church organ. Seventy-five instruments with loudness layers and alternate takes, about 2.3 GB. The recordings are the VS Chamber Orchestra Community Edition by Versilian Studios, released into the public domain, with their instrument maps.

Installing

  1. Open the .pkg and follow the installer. It needs your Mac password once to copy into the system plug-in folders.
  2. Open Live. If it does not see the new plug-in, go to Settings, Plug-Ins, and press Rescan.
  3. Drop Thetis on a MIDI track or OrbitVerb on an audio track. The first time, it asks for the email you used here and the trial code from the email. The 14-day trial starts then, and the same code works for both plug-ins.
  4. Push shows the main knobs on the first page.
  5. When you buy, the key arrives by email. Click the TRIAL button in the plug-in header, paste the key, press Activate. Done, on up to three Macs.
Early release note. These first builds are not yet signed with Apple, so macOS says it could not verify the installer is free of malware. Press OK, then open System Settings, Privacy & Security, scroll down to the line saying the Nebula installer was blocked, and press Open Anyway. The installer then runs normally. Signed builds are coming and this note will go.

What is new

DateChange
11 Nov 2026Thetis 0.2.2: sound clean-up. Seventy-one presets that imitate acoustic instruments lose a stray sub-octave that was on by default; Flute, Pan Flute, Shakuhachi, Harpsichord, Accordion, Sitar, brass, strings and the plucks reshaped against measured spectra of the real instruments; Koto Pluck clicks fixed. PERFORM page in the standalone: set list of tunes with the backing rendered once and the basses played live by the synth, section jumps, a bar-synced looper, EXPORT WAV, Push 3 transport. Fixed Stars look. Three more DnB Bass presets and a Trap bank (808s with the pitch drop and glide, bells, flute, dark pluck, brass stab, choir, lead, dark keys). The Polish ceiling has a lookahead now, so hard hits no longer crack. No more Mac alert beep on key presses.
10 Nov 2026Thetis 0.2.1: three more DnB Bass presets picked from a listening test (Ghost Reese, Gate Wobble 1/4, Sub Wobble 1/8); Gate Wobble 1/8 now wobbles on straight eighths, not triplets. 361 presets.
10 Nov 2026Thetis 0.2.0: drum and bass update. DnB Bass bank (Reese OTT, neuro, wobbles, hoover, talking and metal Reese, gated Reese), OTT multiband compressor, sub oscillator block with wave and octave, phase reset and spread, clean-below distortion, resample any sound to a wavetable, sample-accurate MIDI, 32 modulation slots with polarity, drag a source from any panel onto a knob, depth as a target, step gate. 361 presets.
15 Oct 2026Thetis 0.1.0 build 2: modulate any knob (80 targets, 16 slots), four LFOs with tempo sync, retrigger and drawable shapes, a third envelope, 16-voice unison with spread modes, draggable effect order, a second filter with serial, parallel and split routing, on-screen keyboard, the Motion bank. 361 presets.
12 Oct 2026Thetis 0.1.0: first public build. Modulation rings and drag-and-drop routing, trail with per-change undo. Modal, Fold and Phase Distortion engines, resynthesis, spectral morph, diode and SEM filters, BBD chorus and tape, trail, A/B morph, MPE, 361 presets.
4 Oct 2026OrbitVerb 0.9.0: first public build.