How to write Ab/Gb chord into Hookpad if using Db Major Scale in Hookpad?
An Ab with a Gb in it is a V7 chord. Gb is the seventh so you want an inversion, in this case third inversion. To add this chord, click the 7 check box and change the inversion option to 3rd and add a 5 chord. Hookpad will notate this a V42.