To RareNoise's great credit, the label brings international voices to the UK scene which we should really be more aware of.

Tassignon has a long pedigree on the European jazz, improv and ‘new music’ scene, but this is her first ‘solo’ release.

Well, you say solo, but the singer has so multi-tracked her voice that with Mysteries Unfold we share time with a whole choir of Tassignons. The mille feuiHes layering of acapella voicings is as old as music. But to fractalise your own voice across such a range of styles remains novel.

Tassignon draws on various heritages. ‘Cum Dederit’ is grounded in an ethereal Vivaldi piece but she also turns Dolly Parton's ‘Jolene’ into a polyphonic pleading, dripped with echo and backed by the loneliness of a seagull's cry. Even her own writings jump gears: ‘Don't Be So Shy With Me’ is a witty prance you can imagine Gwyneth Herbert whistling through, while ‘Descending Tide’ comes into being as subtly as the first snow in a frozen sky.

But there's nothing winsome here: ‘Witches’ is gorgeous terror, while ‘Gubi Okayannie’ summons the spirit of Orthodox church music while giving gentle strength to dissidence.

The never-ending patterns mean the mysteries unfold but of course are never revealed. But then we wouldn't want them to be, would we?