Hi Cudo,

Sometimes with BIAB, it's necessary to be a inventive with chords. While the program has heaps of available chords (have a look under the drop-down menu in "Chord Builder" and you see all those possibilities), not every possible chord invented is available.

So to answer you question ...

CMaj7(#5) = C E G# B

Now, since the bass will be playing C and the notes "E G# B" are an E major chord, it's possible to create CMaj7(#5) as an E chord over a C bass. In BIAB this is entered as E/C.

This also leads to the general pattern that whatever Maj7(#5) I want, I play the major chord whose tonic note is a major 3rd up from the chord I'm after over the bass of the chord I'm after.

For example, you mention bIII. So, if we're in the key of G and we need a BbMaj7(#5) - since Bb is bIII - then (a) a major 3rd up from Bb is D so (b) the BbMaj7(#5) chord becomes D/Bb.

Also,since #5 means the chord is an augmented chord, it would be possible to simplify this chord to C+ or Caug.

Hope this makes some sense,
Noel

MY SONGS...
Audiophile BIAB 2025