Question concerning python scripting

[Peter O'Doherty]

Hi,
Is it possible to create a multiset path in python? At the moment is seems that only one dimensional paths are possible.
Regards,
Peter  

[christopher ariza]

hi peter. can you describe a bit more of what you mean?

paths in athenacl are an ordered sequence of pitch collections (multisets), which can be interpreted as pitch space, pitch class, and set class values.

[Peter O'Doherty]

In the "Example 3-1. Creating a new PathInstance with PIn" example in the tutorials four multisets are created and allocated to a path. They are also automatically allocated a "durFraction" which treats them as 4 members of a path.
Whereas in "F.1.12. script03c.py: Tendency Mask: Random Values between Triangle Generators" the pin has the members "d,e,g,a,b" which just seems to be one multiset. Is it possible to use multiple multisets in this field in a python script? If, so what is the syntax for this?
Hope that clarifies.
Thanks again.

[Peter O'Doherty]

Hi Christopher,
Any pointers on creating a multiset path? Is it even possible in a python script?
Many thanks,
Peter

[christopher ariza]

sorry for the delay! i see your question. in short: spaces.

in demo/midi/script03c.py, command-line arguments are being fed to an Interpreter instance.

when using this approach, each string works the same as a command-line string in an interactive session.

so, in an interactive session, you can use a space to delimit multipaths within a path. any syntax that works for a path works here, it just needs to be given all without spaces, and spaces delimit path components.

for example, here i create 1 path with 4 multisets; the first from pitch classes, the second from a xenakis sieve, the third from a set class, and the fourth from pitch space values.

pi{}ti{} :: pin a 3,4 3@7 3-11 f2,f#9
PI a added to PathInstances.

pi{a}ti{} :: piv
PI: a
psPath 3,4 -11,-8,-5,-2,1,4,7,10 0,3,7 -19,66
D#4,E4 C#3,E3,G3,A#3,C#4,E4,G4,A#4 C4,D#4,G4 F2,F#9
pcsPath 3,4 1,4,7,10,1,4,7,10 0,3,7 5,6
scPath 2-1 4-28 3-11A 2-1
durFraction 1(25%) 1(25%) 1(25%) 1(25%)
TI References: none.

in a script feeding strings to an Interpreter, you can provide 'pin a 3,4 3@7 3-11 f2,f#9' to get the same result.

does that answer your question?

[Peter O'Doherty]

Absolutely! Exactly what I was looking for, thanks.

Incidentally, many thanks for your work on athenacl and congratulations on producing such a great system. I've been dipping in to it on and off for a few years (I mostly use SuperCollider) but I just recently discovered the possibility of using python scripts (has it always been possible and did I just miss it?!) and that's made it even more attractive for me to use now.
Thanks again.
Peter

[christopher ariza]

great! thanks for your comments; feel free to send any further questions.