Their music, which features improvisation, has been classified as world, folk and jazz.

According to Becker, the group initially focused on works that featured improvisation.

His live performances feature improvisation and the use of loop-delay effects.

His first recordings in 1925-28 featured often jazzy improvisation.

Much of Johnson's music featured experimental improvisations that would now be categorised as jazz rather than blues.

However, not all mumblecore films feature significant improvisation.

A jam session will often feature improvisation.

Some sponsors appear on the show themselves, either in pre-taped or participatory segments that feature extemporaneous improvisation with House.

His band frequently featured a banjo and a trombone, and contrapuntal improvisation.

It features improvisation on Jack Schroer's alto saxophone and a backing vocal trio.