She has written a large amount of music for orchestra , including two symphonies and several concertos -LRB- for violin , viola , cello , oboe , saxophone , trumpet , percussion , flute and accordion -RRB- .

She has also written concertos for the flute , viola , saxophone , percussion and accordion and is planning to write concertos for viola -LRB- her third -RRB- , saxophone quartet and cello .
