Piano Accompaniments for the Theo Charlier 36 Etudes. No. 1 through No. 18. Note to the performers: Some of the solos have an introduction which is clearly bracketed in the piano accompaniment.The pianist should point these out to the soloist for the original etudes do not have introductions. Some of the Etudes also have interludes which are clearly marked in the accompaniment. Again, the pianist should point these out to the soloist so there is no confusion in the performance.