Substitute

present and so it’s perfectly fine to call them 7 b 5. Hopefully that’s clear…

Believe it or not, the #4/ b 5 interval these chords are built around was actually banned from use in Renaissance church music, though we believe a more modern attitude. Most of these chord shapes demonstrate the inclusion of a sus #4 added to a regular 5 chord – we’re calling it a #4 rather than a b 5 because there is already a 5th present in the chord and we have to make it obvious to avoid any confusion. This isn’t so in the last two examples because there is no ‘regular’ 5th