Generate Chordal Harmonies from Single Note Inputs

I have used this for quick orchestra chordal output.

It's an updated version of the One Finger Orchestra Script for Major Key composing/performing.
I added a Transposing Index.

There's an example of it's use on SoundCloud: 

INPUT NOTES with Transposing Index = 0

C - C Major
C# - A7/C#
D - D Minor
D# - B7/D#
E - E Minor
F - F Major
F# - D7/F#
G - G7
G# - E/G#
A - A Minor
A# - A# diminished
B - G7/B



insert code here # StreamByter Orchestra Major Key Transposing Index
# Block the original note pressed
# Add Transpose Index - Add an index to every note played
# by McDtracy, Ki and Nic

IF LOAD
# note C C# D Eb E F F# G Ab A Bb B
ASS K00 = -C -4 -C -4 -C -C -4 -C -4 -C -3 -C
ASS K0C = 07 06 07 06 07 07 06 0A 06 07 06 06
ASS K18 = C C C C C C C C C C C C
ASS K24 = 10 0F 0F 0F 0F 10 0F 10 0F 0F 0F 0F
ASS G1 = 0
END

# Transpose up this many 1/2 steps
ASS G1 = 0

# handle note on/off events
IF M0 < A0
# get note index
MAT I0 = M1 % C

# send the input note with the transposition
MAT I2 = M1 + G1
SND M0 I2 M2

# add first note (uncomment SND to add lower bass notes - good for acoustic guitar, harp, etc)
MAT I1 = M1 + KI0
MAT I1 = I1 + G1
#SND M0 I1 M2

# add second note
MAT I0 = I0 + C
MAT I1 = M1 + KI0
MAT I1 = I1 + G1
SND M0 I1 M2

# add third note (uncomment SND to add Octave up of the Input Note - good for acoustic guitar, harp, etc)
MAT I0 = I0 + C
MAT I1 = M1 + KI0
MAT I1 = I1 + G1
#SND M0 I1 M2

# add fourth note
MAT I0 = I0 + C
MAT I1 = M1 + KI0
MAT I1 = I1 + G1
SND M0 I1 M2

NX = XX +B

END