Architecture
Contents
2. Architecture#
Considering the scope and function of the application, an object-oriented “layered monolith” approach seems the most reasonable.
The application will consist of a “back-end” python library handling the core functionality and a web-app “front-end”, providing users with a graphical user interface.
TROP Architecture#
Process#
First, the mode and root are specified to define the scale, from which iteratively the music phrases are generated based on the user input.
The music-input follows, with it being divided in phrases, instead of being done in bulk. This is done in order of barlines to be able to mark phrase endings.
The syntax is automatically checked with the creation of each instance.
Phrases are transformed into a music21 stream object then combined into the composition using the combine_phrases() method, which takes a list of phrases and combines them.
Input Syntax#
The note-input is a string of specific characters.
Entry is done note by note, where text, fthora, rhythmic signs and ison are entered with the note itself. Notes are separated by commas (,).
The first and only not required is the melodic direction, where 0 indicates repetition of pitch and integers are used to indicate the number of steps (1 being one step higher, -3 being three steps lower).
Additional note-features are entered in brackets following the digit.
Parameters#
Parameter |
bracket |
|---|---|
text |
( ) |
rhythm |
[ ] |
fthora |
{ } |
Text#
Text is entered syllabically. Hyphenation has to be entered as well, if it is to appear.
Rhythm#
Rhythmic symbols are entered with certain strings above the note they apear to be written above or below. The acceptable input here is ‘k’ for klasma, ‘a’ for aple, ‘dp’ for diple, ‘tp’ for triple as well as ‘g’ for gorgon, ‘dg’ for digorgon and ‘tg’ for trigorgon.
The names here refer to the names of the rhytmic symbols.
Fthora (modulation)#
Additon of fthore (modulation signs) “re-calculates” the scale in the transformation process.
Ison#
The ison is entered as a syllable with an underscore as prefix following the melodic direction of the note over which it appears.
TROPARION Architecture#
Process#
As before, the mode and its root are being initially specified and a selection is made, if lyrics are to be inlcuded.
Before user input can commence, a phrase needs to be initiated.
As before, the melodic direction, to which rhythmic symobls or text may be added, has to be entered first.
Input#
Prosodic signs are represented by buttons which the user only needs to click, text is to be specified and attached.
Attachment of ison, rhythmic symbol or text is always dodne to the last melodic direction specified.
Text is entered syllabically. Hyphenation has to be entered as well, if it is to appear.