Composed by Bochsa, Twenty-five studies, Op. 6a is a set of part of the Favourite studies from the same author for intermediate and advanced Harp players. Reviewed by Alphonse Hasselmans, each studies has a different difficulty level and can be played separately.

This set of studies will help the Harpist to gain in flexibility and speed, and would ideally be played on pedal Harps.

In the same series, Bochsa also composed a set of 'Forty easy studies, Op. 318', a set of 'Twenty studies' in two books and one called 'Fifty studies, Op.34'.

All these sets have been reviewed by Alphonse Hasselmans, professor at the Paris Conservatoire, who also indicated the best finger positions to use.