In Richard Strauss’s early Cello Sonata Op. 6, we hear flickers of his distinct musical personality sprouting amid cracks in a traditional Germanic facade. Not many works from Richard Strauss’s teenage years still get performed, but this one has become part of the repertoire. Piano and cello are woven tight here, in this case moving from the lyrical verve and heavy Brahmsian chords of the opening to a four-part fugue. Mendelssohn’s easy lyricism can be heard in the Romance-like Larghetto while the same composer’s elfin lightness peers through Strauss’s final Allegro vivo.