John Scott Whiteley discusses the playing of ornaments in Bach, with a performance of Erbarm dich mein, O Herr Gott, BWV 721, on the organ of the Wenzelskirche, Naumburg. This video is one of 26 in a series entitled An A-Z of the Organ, filmed by the RCO team and colleagues around the UK at the height of the Covid-19 lockdown. Starting with A for Anthology and concluding with Z for ? (wait and see!), the series aims to explore various perspectives on the organ - its tonal characteristics, some of the repertoires associated with it, a range of organ-related…