John Hagstrom: Second Trumpet, Chicago Symphony Orchestra
Andrea Lucchi: 1st trumpet Santa Cecilia Orchestra Rome.
Doctor Valve: Steve Winans, trumpet restoration and repair expert.
Gabriele Cassone: Baroque trumpet virtuoso.
Peter Baumann: Maker of trumpets, bass trumpets, tenor horns, Wagner tuben.
Schilke Music Products Company: Brass instrument manufacturer.
Andrea Giuffredi: - Italian jazz, pop, symphonic soloist.
Ole Edvard Antonsen: - Honky Tonk Woman.
Vintage Mutes: Dutch Uithoven, antique mute collector, historian, jazz blues artist.
Giuliano Sommerhalder: First trumpet of the Leipzig Gewandhaus Orchestra.
The Slide Doctor: Lightening fast slides, meticulous service!