In 2012 Rojas released a solo album, Latin Piano Expressions, featuring his own works, Piazzolla's Resureccion de Angel and Histoire du Tango as well as four free improvisations.
One of his most widely performed works, Danza de Montañas for solo piano (2003), features the influence of Afro-Cuban dance rhythms as well as the music of the indigenous communities of the Peruvian Andes.
[9] Entre Bajos y Altruas, commissioned by pianist, Zubin Kanga, features a partly prepared piano (evoking a thumb-piano in some sections and the percussion of a salsa band in others) as well as dense polyrhythms and rapid changes in metre.
[10] This fusing of traditional Latin American genres with rhythmic techniques borrowed from Stravinsky, Bartók and Messiaen are also found in his major ensemble works, Danza Amarosas (written for the Kammer Ensemble in 2007), Mirimba for solo marimba (commissioned for Claire Edwardes) and Marimba Concerto (for percussionist, Claire Edwardes and the Sydney Metropolitan Orchestra in 2013).
2 ("Entre Ritos y Parrandas"), commissioned by Ars Musica Australis for the Sydney Youth Orchestra and soloist, Konstantin Shamray, is more unorthodox in structure, starting with a pentatonic folk melody and gradually changing into a savage style.