A composition in Carnatic musical style by Srikumar K. Subramanian, June 1995. Name: “-gr.trial.mohanam”.
This is a non-stop improvisation of variations in a style akin to Carnatic music. The compositional approach, here, lies in deciding that every variation should contain 32 notes and it may use up to 20 “ideas”. To this effect, a flag named Ideas is set to 20 at the beginning, and it it decreased by 1 unit in certain rules (such as GRAM#2) or 2 units in other rules (such as GRAM#2). Read page Flags in grammars for more details.
Rules in subgrammar #3 can only be candidate if a few ideas are left, though they do not decrease Ideas.
Rules in subgrammar #6 use wildcards to create patterns.
Rules in subgrammar #9 create “effects” by changing velocities.
In the ‘Improvize’ mode, the values of flags and rule weights may be carried over from one variation to the following ones. Thus they can be used to trigger/inhibit events arbitrarily remote from the ones that created/modified them.
The following output was recorded on a Roland D-50 synthesizer.