VocalEasel/mma/egs/misc/roman.mma

Tempo 120

Print A short demo for Roman numeral chord notations.
Print The warning messages are correct for MMA. Using
Print standard chord notation will generate the same results.
Print The numbers on the left are line numbers.
Print

Debug Roman=1  // display conversions

keysig Bb Minor 

Print Standard chords with slash-Roman chords
Print Here, key signature doesn't matter.
Print

C/V
G7/vi
A     // should not print
Bb /  / C7/v

Print
Print Keysig is $_Keysig
Print Roman chords, show translations
Print

I / V
I / iv

Keysig A
Print
Print Same chords, key is A
Print

I / V
I / iv

Keysig G Minor

Print
Print Key now $_Keysig  Do some normal and slash chords.
Print

vii/V
vi/V
V/ii
II+
V7
ii6
iii6/5

Keysig C
Print
Print Some goofy combinations, in key of $_KeySig
Print

Vm7          // Really should be v7
iim7&5       // should be a ii-0 (half dim)
ii6(add9)
I6(add9)
Ibm7

Keysig Gb
Print
Print Some incorrect flat/sharp notations we permit, key $_Keysig
Print

I      // Key Gb, should be Gb
Ibm    //  should be Gbbm (dbl flat) or Fm
ib     //  same result (lowercase i==minor), Fm
I#     //  intermed is Gb# which becomes G

i0       // this if fine, a Gb dim3 (3 is a mma extension)
I#dim    // odd, but gives G dim (will end up a dim7)
i#0      // still odd, a G dim3 (see how '0' is a triad)
i#07     // and here we have G dim7 

Print
Print If you have an extended keyboard or can enter extended ASCII
Print characters into your file, you can use character 176 for "DIM"
Print and character 248 for half-dim. NOTE: You may need to change
Print your terminal settings to display the degree symbols.
Print

i°        /// This is a degree sign, diminished (lowercase)
i°7       /// Diminished 7
vø7       /// and this is a half-dim (lowercase)

Print