Hey i have been using the hooktheory api for a personal project and i have been using specifically the (trends/nodes?cp=4,1) entry point. I have been calling specifically the popular chord progression from the site as i see them by using the specified numbers just like the api documentation says for example (C = 1 , F = 4). Later though some chord progressions use some weird note variations like the The cadential 64 chord progression. How do i translate the C/G note so the api can understand what specific chord progression im requesting?
You can use 164 to denote a I chord in second inversion (C/G in C major)