A concerto is usually a solo instrument (sometimes two or three, but usually one) with orchestral accompaniment. A sonata is usually a solo instrument with piano accompaniment. A symphony is a large work written for a full orchestra.
A concerto is usually a solo instrument (sometimes two or three, but usually one) with orchestral accompaniment. A sonata is usually a solo instrument with piano accompaniment. A symphony is a large work written for a full orchestra.