I listened to Jacques Loussier’s “Bach to Bach Trio” playing “Toccata & Fugue in D Minor” by Bach.
This has a strong piano opening, a cymbal roll and the first hint of a jazz element enters with brushed cymbals. The double bass adds a very syncopated, jazzy bass line.
The piano part stays fairly true to the original piece but occasionally sees a change in rhythm with syncopation, dotted notes; it becomes swing style.
True jazz improvisation then takes over influencing the harmony. Loussier takes the piece straight back into the classical style before taking it into the jazz form once more. Seamless juxtaposition of the two styles appears effortless and it is a fabulous interpretation.