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 Ellington Tuba mirum by Mozart Back Together Again by Roberta Flack, ft Donny Hathaway Killing Me Softly With His Song by Fugees Other music in this episode:

Krupastrophe by Callum Au & Louis Dowdeswell Heaven by Emeli Sandé Sinfonia 'Infernali' from L'Orfeo by Claudio Monteverdi Killing Me Softly With His Song by Roberta Flack Empty Chairs by Don McLean