Reverential
Browsers only start audio on a click, so the synth waits for one.
Boethius is a software synthesizer, playing here in the browser with no install and no DAW — the same engine that ships inside the plugin, and the same front panel.
The engine
Wavetable, band-limited, eight slots per voice, each with its own gain, pan and ADSR. True stereo with constant-power panning.
Where it runs
VST®3 and AUv3 in a DAW, or standalone on the desktop. Confirmed in Reason and Ableton Live.