Has a professional baritone, he has performed with the Oregon Bach Festival, the Santa Fe Desert Chorale, Conspirare, the Handel and Haydn Society, and the Festival dei Due Mondi in Spoleto, Italy.
Sundance Film Festival | Cannes Film Festival | Toronto International Film Festival | Glastonbury Festival | Edinburgh Festival | Royal Festival Hall | Venice Film Festival | festival | Tribeca Film Festival | Salzburg Festival | Montreux Jazz Festival | Edinburgh Festival Fringe | Oregon Shakespeare Festival | Opus Dei | Monterey Jazz Festival | film festival | Bayreuth Festival | Metro Manila Film Festival | Newport Jazz Festival | Locarno International Film Festival | International Film Festival of India | Festival of Britain | Glyndebourne Festival Opera | Coachella Valley Music and Arts Festival | Viña del Mar International Song Festival | Vancouver International Film Festival | Sanremo Music Festival | Due South | Aspen Music Festival and School | Tanglewood Music Festival |
Wadsworth gained international renown in 1960 by originating the Midday Concerts at the Festival dei Due Mondi in Spoleto.
As a singer she has performed with international and American Opera companies as a principal artist: La Traviata at the Metropolitan Opera, La Favorite in Montpellier, France, and Goya at the Spoleto Festival in Italy.
Composed in 1955, the opera premiered on June 20, 1958 at the very first Festival dei Due Mondi in Spoleto, Italy in a production produced by Gian Carlo Menotti and conducted by Reinhard Peters.
Besides national festivals he appeared at the overseas ones such as Lockenhaus Chamber Music and Turku music festivals as well as Festival dei Due Mondi.