Trombonist, arranger and big band leader Callum Au, and composer, pianist and singer Natalie Duncan, are today's studio guests as they look for unexpected links that connect five disparate tracks. With Anna Phoebe and Jeffrey Boakye, they head from an early Adele classic to a reinterpretation of a Roberta Flack hit via a 15-minute reworking by Duke Ellington of one of his most celebrated works.

Producer: Jerome Weatherald

Presented with musical direction by Jeffrey Boakye and Anna Phoebe

The five tracks in this week's playlist:

Chasing Pavements by Adele

Mood Indigo by Duke EllingtonTuba mirum by Mozart Back Together Again by Roberta Flack, ft Donny HathawayKilling Me Softly With His Song by Fugees Other music in this episode:

Krupastrophe by Callum Au & Louis Dowdeswell

Heaven by Emeli SandéSinfonia 'Infernali' from L'Orfeo by Claudio MonteverdiKilling Me Softly With His Song by Roberta FlackEmpty Chairs by Don McLean