Robin Williamson: vocals, harp, guitar, whistles
Mat Maneri: viola, violin
Paul Dunmall: tenor and soprano saxophones, clarinet, border pipes, ocarina, moxeño
Ale Möller: mandola, lute, hammered dulcimer, shawm, clarino, drone flutes, natural flutes, bamboo flutes, vibraphone
Mick Hutton: double-bass

Cymin Samawatie: voice, Benedikt Jahnel: piano, Ralf Schwarz: double-bass, Ketan Bhatti: drums

Mona Boutchebak: vocals, oud; Jon Balke; piano, keyboards, percussion; Derya Turkan: kamanche;  Pedram Khavar Zamini: tombak; Helga Norbakken: percussion; Bjarte Eike: baroque violin; Alison Luthmers: violin; Øivind Nussle: violin; Milos Valent: viola; Per Buhre: viola: Torbjørn Köhl: viola; Judith Maria Blomsterberg: cello; Mime Brinkmann: cello; Johannes Lundberg: bass 

American Roots in a Nordic mood: "Trail of Souls" links the American gospel and spiritual tradition with the Norwegian sound aesthetic.

Björn Meyer: bass guitar

Björn Meyer: bass guitar

Anouar Brahem: oud; Dave Holland: double bass; Jack DeJohnette: drums, percussion; Django Bates: piano