I agree an ostinato is a repeating phrase, or a repeating rhythm, rather than what has been identified above as a pedal point. I also call this a pedal bass, since BIAB has that feature. We've already talked about exactly this in anther thread.

A pedal bass creates tension, as Noel mentioned, although this particular progression doesn't create all that much tension for me. For example, if you had D/C, Db/C, then that tension is more perceptible.


BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Presonus Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.