Shaking The Pumpkin featured Bruce Cockburn (on "How the Violin Was Born"), Dalbello (on "Rules Are Made to be Broken") and singer Robert Palmer on a version of Jimi Hendrix's "Purple Haze".
Marsh collaborated on film scoring projects with composers Harry Gregson Williams and Don Rooke, with compositions featured on such films as Armageddon, Whatever Happened to Harold Smith, Spy Game, Sinbad, Legend of the Seven Seas, The Rundown, Veronica Guerin, Man on Fire, Shrek 2, Return to Sender, Domino, Kingdom of Heaven, The Chronicles of Narnia, Still Mine and Seraphim Falls.
In 2004 Marsh joined clarinetist Don Byron's new quartet "Swiftboat", along with Kermit Driscoll on bass and Pheeroan Aklaff on drums.
Marsh toured as part of trumpeter Jon Hassell's new quartet with bassist Peter Freeman and percussionist Steve Shehan.
[2] Marsh also performs with the Toronto-based band 'Three Metre Day' featuring Michelle Willis on pump organ and vocals, Hugh on violin and Don Rooke on slide guitar.