This is a work in progress. Today’s sketches use my microtonal slide piano. The chords can slide from a 7:9:11 to 4:5:6, in various inversions. Csound allows for any function table to control the pitch, so I used several that are similar to this one:
The Csound code looks like this:
f 471 0 129 -6 1 4 1 4 1 16 1.0400 16 1.0801 4 1.0676 4 1.0551 4 1.0676 4 1.0801 4
1.0676 4 1.0551 4 1.0676 4 1.0801 4 1.0676 4 1.0551 4 1.0676 4 1.0801 4 1.0676 4
1.0551 4 1.0676 4 1.0801 4 1.0676 4 1.0551 4 1.0676 4 1.0801 4 1.0676 4 1.0551
The function starts at 1 and rises to 1.0801, which is 8 steps in 72 EDO, approximately a 13:12. I have a few dozen of these for the most common intervals. It falls by a single 72 EDO step and goes back up for 8 cycles or so. I think it sounds like a guitar whammy bar.
I’m not sure what this has to do with Amazing Grace, except that the first chord of the song is a G major. Just like Amazing Grace!
Play it here: or download this linkSubscribe here: 
