We (myself and Glyn Lloyd-Jones) adopted the name Cassiel early in 1990 as a project name for live performance at the UK Electronica festival. I had no idea I’d still be using it as a professional company/project name nearly a quarter of a century later.
We created the multispeaker surround soundtrack for the piece, using recordings of the Tenebrae Responsories by James MacMillan. (Technically, MacMillan’s work was licensed for remixing, although the compositional process involved building a bespoke Max for Live instrument and improvising control changes to manipulate, phase-shift and spatialise short loops of the original material.)
Tickets are available here. Many of the performances are already sold out.