MZIK - A Music Interpreter / Program Creator
Author: Jonathan T. Higa
  Date: Wed Dec 18 1991

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³ Mini-instructions: String of music notation; MZIK; wait; EVAL.  -jkh- ³
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     MZIK is a music translator.  It takes a string in level 1 and returns
a program in level 1.  It follows the conventions of the music interpreter
which I've seen in IBM Advanced BASIC, except for the following:

     1. There is no "MS" or "ML" command; you'll have to insert pauses for
staccato music.  (I promise that it's really not that bad; you have better
control over exactly how staccato a note will be.)

     2. There is an "H" directive, meaning to tie the previous note to
another of the same frequency and specified duration.  For example, "A2H8"
translates to a half note tied to an eighth note.

     3. There is a "K" directive, meaning to change the key in the presence
of accidentals, as in "K#" (which transposes up a half step), or to set the
frequency of the octave-zero A in the absence of accidentals, as in "K55"
(so that the octave 3 A is 440 Hz).

     4. The interpreter is case-sensitive.

The syntax of the source string is:

     cmdchar[accidentals][number][dots]

repeated _ad_libitum_, where cmdchar is one of "ABCDEFGHKLOPT<>",
accidentals is an optional string whose chars are in "-+#b", number is an
optional whole number, and dots is an optional string of dots.  There may
not be spaces separating the cmdchar from its qualifiers, but there may be
whitespace separating command units, like "Ab4 E#8."

     Here's a sample (Greensleeves) to get you started:

"T84O3L8EG4AB.>C#16<BA4F#D.E16F#G4EE.D#16EF#4.<B4>EG4AB.>C#16<B
A4F#D.E16F#G.F#16ED#.C#16D#E4.E4.>D4.D.C#16<BA4F#D.E16F#G4E
E.D#16EF#4D#<B4.>>D4.D.C#16<BA4F#D.E16F#G.F#16ED#.C#16D#D#E4.E4"

[Note: This is on the disk as 'GREEN.SRC'.  -jkh-]

You might want to experiment with short test strings to see how it
processes them.  If not, the code is easy enough to read.
Happy holidays!

Jonathan (jonhiga@phoenix.princeton.edu)
Address:  65 Campbell, Princeton University, Princeton, NJ 08544
Home Phone:  (609)258-9329

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Note about music notation by Joe Horn:

In case you aren't familiar with G(ates)W(illiam)-BASIC,
here are the codes that Jonathan's program looks for:

Spaces  No effect
A-G     Play the specified notes (e.g. ACB plays A then C then B).
P       Pause (rest); effectively a silent note.
O n     Sets octave n (e.g. O3 sets middle octave).
>       Go up one octave (e.g. CDEFGAB>C plays the C scale).
<       Go down one octave.
# or +  Sharp preceeding note (e.g. A# or A+).
b or -  Flat preceeding note (e.g. Ab or A-).
L n     Sets length of each note (e.g. L4 is quarter note; L1 is
        whole note; L8 is eighth note, etc.)  SHORTCUT: You may also
        put the desired length after each note, e.g. A8 B2 is the same
        as L8 A L2 B.  Likewise P2 is the same as L2 P.