It is possible and indeed rather easy to write a GUI for Csound in Python, absolutely, but it is not so easy to get to run as a VST plugin.

I completely agree with you about cross-platform support. 

Another possibility is to simply drop the VST plugin support entirely. Is anyone actually using that? When I've played with it, I've really, really liked it. You really can sit in Cubase and score for a running Csound orchestras in regular music notation. Cool! 

But unfortunately, I don't compose by scoring, usually.

On the other hand, surely it is possible to get CsoundVST working on OS X.

Regards,
Mike



-----Original Message-----
From: Victor Lazzarini 
Sent: Oct 28, 2005 4:23 AM
To: csound-devel@lists.sourceforge.net
Subject: Re: [Cs-dev] OSX CsoundVST issues

I think that we should provide flexible ways of interacting with
csound. I see that this is already happening. Another important
thing is to be multiplatform, and provide an unified behaviour across
platforms.

In relation to python, is it not possible to write a python script that
will give you a GUI and a button to press, to mimic what CsoundVST
does?

It might be worth, in the long run, to provide CsoundVST as a VST plugin/
standalone frontend only, to ensure it runs on all platforms. That does not
rule out providing a separate windows or linux-only program that does 
everything,
but as something separate from the 'canonical' csound 5 distribution.
However I understand you might not want to have to maintain two separate
projects.

Victor

At 18:14 27/10/2005, you wrote:
>I'm open to suggestions here. One advantage of CsoundVST for Python work, 
>is that it gives you the ability to stop a running performance by clicking 
>on a button; CsoundVST bails out of the csoundPerformKsmps loop in that case.
>
>I'd be quite interested to hear your thoughts -- or anyone's thoughts! -- 
>on how Csound 5 can, will, or should be used. A wish list would be nice. 
>My interests focus on writing compositions as code including both 
>orchestra and score stuff, but I would like to know what people would like 
>to see: is a GUI front end important, a DSSI plugin important, a VST 
>plugin important, language interfaces, etc.
>
>Thanks,
>Mike
>
>-----Original Message-----
>From: Victor Lazzarini 
>Sent: Oct 27, 2005 12:14 PM
>To: csound-devel@lists.sourceforge.net
>Subject: Re: [Cs-dev] OSX CsoundVST issues
>
>I have tested python importing csnd on OSX and I could
>run a script that Istvan suggested, and I got to play Trapped
>alright. So that bit works. And if CsoundVST (lib) is built as a bundle,
>I'd say it would also run OK, although I have not tested it.
>
>As the code is at the moment, if CsoundVST (app) tries to load, as
>a python interpreter, bundle containing a copy of the same object
>code in CsoundVST (lib), then there will be two different instances
>of csound in memory. CsoundVST crashes, but the crash might
>be unrelated to that. So if you were to load the csnd module from
>a python interpreter in CsoundVST, you might get the same problem.
>
>So it is possible that a CsoundVST without python will work OK. I'm not
>sure how you would want to provide this, but to me it seems that if
>you want to work with python and algorithmic composition, you
>can do it from python by importing csnd and the algorithmic composition
>module. That would work on OSX. And if you want VST plugin and frontend,
>then you just run CsoundVST.
>
>Victor
>
>At 16:46 27/10/2005, you wrote:
> >My plan is for CsoundVST to load and use the csnd module as one Python
> >extension, and the Silence algo-comp classes as another Python extension
> >module. But, I may simply drop the Python support from CsoundVST and let
> >it be purely a VST plugin. I prefer to code and compose in a Python code
> >editor anyway.
> >
> >So, do you think it would work to run Csound from Python importing "csnd"
> >on OS X?
> >
> >Thanks,
> >Mike
> >
> >-----Original Message-----
> >From: Victor Lazzarini 
> >Sent: Oct 27, 2005 11:03 AM
> >To: csound-devel@lists.sourceforge.net
> >Subject: [Cs-dev] OSX CsoundVST issues
> >
> >| At 15:31 27/10/2005, you wrote:
> >| What would need to be changed to build and run it on OS X?
> >
> >I'm still looking at it, but I think the problem lies in the
> >way the same dynamic lib is used twice in the program. In other
> >systems, this is not a problem as the same type of dynamic lib
> >is used as an ordinary shared library and a loadable module.
> >
> >The problem on OSX lies in the fact that, and that seems to be
> >a python-specific issue, python loadable modules are bundles,
> >and not shared libs.
> >
> >There is no way that the same file can be used as a python module
> >and a dynamic-link library. So I tried creating two: this  generates two
> >separate instances of csound. Then, as Istvan suggested, I tried
> >linking the bundle to the dynamic library: python can't find the
> >entry point. Finally, moved the wrapper object code to the bundle
> >from the dynamic library. Now python can see the entry point,
> >but CsoundVST crashes. Gdb tells me that the program
> >received EXC_BAD_ACCESS, could not access memory (in
> >__dynamic_cast()).
> >
> >When running python and then loading the module, gdb tells me
> >it is stuck in _semaphore_wait_signal_trap().
> >
> >So I am not sure now, given what gdb is telling me, what problems
> >are there. But one thing is sure, the wrapper code works, because
> >if I build a bundle with all the csoundVST sources statically in it,
> >the module loads OK in Python.
> >
> >I noticed that System.cpp was throwing a lot of warnings. One of them
> >was a linking problem of symbol redefinition (basename(), which is
> >found in libpthread and I renamed to basename_(), but that did not
> >change anything).
> >
> >The answer to your question is probably I don't know. However,
> >you could consider making a CsoundVST program that is not a
> >python module, since there is now a python module in _csnd.so.
> >I'm not sure it would be what you want, though.
> >
> >Victor
> >
> >
> >
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>Victor Lazzarini
>Music Technology Laboratory
>Music Department
>National University of Ireland, Maynooth
>
>
>
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Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth 



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