Schubert's Impromptu in B-flat (D 935) No. 3; theme and variations based on a theme from Schubert's Rosamunde
In music, variation is a formal technique where material is repeated in an altered form. The changes may involve melody, rhythm, harmony, counterpoint, timbre, orchestration or any combination of these.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).