Most chord modules in VCV Rack support four notes. I use a lot of upper structures when I compose (yes, even when NOT doing jazz 😉) and would like to use them easily in VCV Rack with some of the good chord modules out there.
Layout:
Key in / Key knob (default C)
Mode of key (default Ionian)
Root / tonic for base chord (the 1 output from the chord module)
5, 6, 7 out (assumes 1, 2, 3, 4 of "source" chord module)
Calculate the 9th (out 5), the 11th (out 6), and the 13th (out 7) based upon given key and root
Switch for enabling "strict" mode; when enabled, the formal rules for "legal" upper structures are followed (so just some of the outs will have values, not all three)
Possible expanded version?
could have an "in" LED showing the implicit chord given the key, mode, and root
could have an "out" LED showing the enabled tensions
For the "strict" mode, here is an example of legal tensions for key of C in Ionian mode:
With root C for Imaj7, legal values: 9, 13 (out 5, 7)
With root D for ii7, legal values: 9, 11 (out 5, 6)
With root E for iii7, legal values: 11 (out 6)
With root F for IVmaj7, legal values: 9, #11, 13 (out 5, 6, 7)
With root G for V7, legal values: 9, 13 (out 5, 7)
With root A for vi7, legal values: 9, 11 (out 5, 6)
With root B for vii-7b5, legal values: 11, b13 (out 6, 7)
Most chord modules in VCV Rack support four notes. I use a lot of upper structures when I compose (yes, even when NOT doing jazz 😉) and would like to use them easily in VCV Rack with some of the good chord modules out there.
Layout:
For the "strict" mode, here is an example of legal tensions for key of C in Ionian mode:
Imaj7, legal values:9, 13(out 5, 7)ii7, legal values:9, 11(out 5, 6)iii7, legal values:11(out 6)IVmaj7, legal values:9, #11, 13(out 5, 6, 7)V7, legal values:9, 13(out 5, 7)vi7, legal values:9, 11(out 5, 6)vii-7b5, legal values:11, b13(out 6, 7)(Note that these will change for each mode.)