Not sure how unusual it was. Mozart referred to his "violin sonatas"--even mature works like K.454--as piano sonatas with violin accompaniment, though they are now usually described as violin sonatas. Schubert's "sonatinas" date from 1816, 25 years after Mozart's death. Had the violin become the expected lead instrument during those 25 years? Can someone shed further light on this question?
Thank you for taking part in the MusicWeb International Forum.
Len Mullenger - Founder of MusicWeb