Program structure for athno.pl

initialize program

setparms :

Reads the file PARM.txt

defineconso :

Reads the file noizez.txt

readphr :

Reads all the phrases, saves cadential info, and creates the three versions ASIS, BYTON, BYID for each phrase.

codaindex :

Finds the "most final" cadence, to serve as the piece conclusion (CODA)

makescore :

Examines all the phrases constructed by readphr, one at a time, and converts them into score. It may skip phrases that have no cadences, and it will stop after the final close (in the phrase identified by codaindex)

rhy :

Defines the rhythm for each phrase. The rhythm is simply a sequence of fractions, e.g.

4/16 2/16 1/16 1/16 4/16 4/16

This represents a 4/4 measure, and fits 6 distinct chords from the phrase (there are 6 durations). The rhythm may change only on a new phrase; in this example, if the number of chords in the phrase is not a multiple of 6, the new phrase will continue with the same rhythm.

In each voice, the notes receive the durations from the rhythm; however, identical notes are "slurred" together. So, in this example, one voice might play:

4/16 3/16 5/16 4/16

while another plays:

4/16 2/16 2/16 8/16

analyse each phrase

advox :

Adds voices, if the texture is too thin

analid :

Checks if the phrase may be compressed to fewer voices, playing chords

compress :

Does the compression, if analid says so

mixcol :

Mixes the columns, i.e. voices, after all the changes and regularizations

genscor :

genericinst :

Picks instrumentation. The instrumentation changes only at a new phrase – that could be improved.

genemit :

Emits notes, rests and hockets

rarefied :

rarefinst :

Picks instrumentation

raremit :

Emits chords, not just notes; also rests and hockets

cad :

calls cadscor

cadscor :

cadrhy :

Makes a special rhythm for cadences, basically slowing down and emphasizing the melodic cadence.

genericinst :

genemit :

coda :

calls codascor

codascor :

codarhy :

Makes a special rhythm for the final cadence.

genericinst :

genemit :