Re: Python instrument and global variables in orchestra

>
> Dear Steven,
>
> Here is my Blue file:
> http://www.nabble.com/file/p21564049/bcf2000-controller.blue
> bcf2000-controller.blue
>
> My purpose is to play Csound into Blue with a MIDI controller (Behringer
> BCF2000). It works fine, but I have to reduce the amount of global variables
> and opcodes (to improve the process) by hand.
>
> I think using the slider32 opcode is a good idea here (slider64 does'nt
> work, I don't know why), better than using zak variables, because it is more
> concise and relevant.
>
> Another problem is that I have to run a MIDI sequencer to record and play
> the MIDI controller. Implementing a track to edit and keep registered
> variables (the output of foutk e.g.) like a MIDI sequencer would be, in this
> case, very usefull. I don't know if Blue can do that actually.
>
> Regards,
>
> Olivier.
>
>
>
> Steven Yi wrote:
>>
>> Hi Olivier,
>>
>> As I mentioned, I do not know if you can do what you ultimately want
>> to achieve musically or not since you have not responded to my request
>> for code or examples. My thought was that you might be able to use a
>> different mechanism than using global variables(I.e. store values in a
>> table to communicate a dynamic number of signals, use zak, possibly
>> use chnget/chnset) , but again I can not help you without more
>> information that I have asked for.
>>
>> As for if I think it would be interesting or not, you could should
>> simply ask to request to implement the it. You should know though that
>> I asked you the above questions so I could determine if there are
>> other ways to do what you want without me having to change code in
>> blue, as it does take up my personal time to do these things and I
>> certainly enjoy whatever free time I can get.
>>
>> Anyways, this could be implemented by making the global instrument
>> area of the python instrument editor have a check box that would allow
>> processing the text as code or not before generating to the global
>> instrument code. This would be the first solution to come to mind,
>> another possibility then would be to change the processing order in
>> the instrument so that one could store global orc code from the instr
>> code  in a globalOrc variable. That if found gets appended to the
>> value in the global instrument tab before generating to the CSD.
>>
>> Anyways, I have to run as I have to to work now on very little sleep
>> for the second day in a row, complete with jet lag. Please review the
>> above and let me know what you think would be better for
>> implementation and we'll see if it can done quickly.
>>
>> Steven
>>
>> On 1/20/09, obaudouin <olivierbaudouin@...> wrote:
>>>
>>> Hi Steven!
>>>
>>> As you, I think there is no solution available for my problem into Csound
>>> or
>>> Blue. However, I can produce separately a csd file with Python and import
>>> it
>>> in Blue...
>>>
>>> Thank you very much for your help,
>>>
>>> Olivier.
>>>
>>> PS: Allowing code generation from a Python instrument into the global and
>>> score instrument tabs is an interesting feature which could be added to
>>> Blue, isn't it?
>>>
>>>
>>> Steven Yi wrote:
>>>>
>>>> Hi Olivier,
>>>>
>>>> So when you say FROM AN INSTRUMENT, are you saying the number of
>>>> global variables is dynamic depending on the python code? (Because
>>>> using "global instrument" tab within the instrument editor is a means
>>>> to create global instrument code that is encapsulated with the
>>>> instrument and is FROM AN INSTRUMENT, so I need this clarification to
>>>> understand exactly what you are saying).  If you are referring to
>>>> generating that from the python code,  I do not think this is
>>>> possible, but there may be other ways to accomplish what you are doing
>>>> than just using global variables.  Could you post some code or an
>>>> example project?  If I can see what you are trying to accomplish, I
>>>> can better try to figure out a solution.
>>>>
>>>> Regarding pre blocks, they are explained here:
>>>>
>>>> http://www.csounds.com/stevenyi/blue/usermanual/html/commandBlocks.html
>>>>
>>>> Thanks!
>>>> steven
>>>>
>>>>
>>>> On Mon, Jan 19, 2009 at 2:42 PM, obaudouin
>>>> <olivierbaudouin@...> wrote:
>>>>>
>>>>> I'm looking for a way to add lines (a lot of MIDI controllers
>>>>> automatically
>>>>> generated) in the global part of the orchestra FROM AN INSTRUMENT, to
>>>>> avoid
>>>>> a copy by hand:
>>>>>
>>>>> 1. gk_var init 0 into an instrument does'nt work (of course)
>>>>> 2. I have never heard of a Csound opcode able to do that (?)
>>>>> 3. and my question is...: a Python instrument could do that in Blue?
>>>>>
>>>>> What is this the ";[pre] {" block ? How do you deal with that ?
>>>>>
>>>>> ---------
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Steven Yi wrote:
>>>>>>
>>>>>> Hi Olivier,
>>>>>>
>>>>>> Have you tried using the "global instrument" tab in the python
>>>>>> instrument editor? That code should be copied to the global area when
>>>>>> generating a CSD.  So you should be able to use:
>>>>>>
>>>>>> gk_<INSTR_ID>_myvar init 0
>>>>>>
>>>>>> and in your code, use
>>>>>>
>>>>>> gk_<INSTR_ID>_myvar
>>>>>>
>>>>>> and doing so will make sure that the variable names are unique per
>>>>>> instrument, regardless of if you make multiple copies of that
>>>>>> instrument.  There should also be no issues with order of
>>>>>> initialization, as that code should be generated at the top of the CSD
>>>>>> before and instrument definitions.  (If you do need to ensure that
>>>>>> code is generated at very very top of global area, you can use a
>>>>>> ";[pre] {" block.)
>>>>>>
>>>>>> Let me know if that is what you are talking about, otherwise could you
>>>>>> post an example .blue file that illustrates the problem?
>>>>>>
>>>>>> Thanks!
>>>>>> steven
>>>>>> On Mon, Jan 19, 2009 at 11:17 AM, obaudouin
>>>>>> <olivierbaudouin@...> wrote:
>>>>>>>
>>>>>>> Hi!
>>>>>>>
>>>>>>> I need that a Python instrument initializes global variables in the
>>>>>>> global
>>>>>>> orchestra. Currently, I copy by hand the "gkxxx init 0..." lines
>>>>>>> produced
>>>>>>> with the python instrument into the global orchestra before removing
>>>>>>> them
>>>>>>> from the instrument, and it is not very elegant!
>>>>>>>
>>>>>>> Thanks a lot for Blue,
>>>>>>>
>>>>>>> Olivier.
>>>>>>> --
>>>>>>> View this message in context:
>>>>>>> http://www.nabble.com/Python-instrument-and-global-variables-in-orchestra-tp21546201p21546201.html
>>>>>>> Sent from the Csound - Blue - User mailing list archive at
>>>>>>> Nabble.com.
>>>>>>>
>>>>>>>
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>>>>>
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>>>>>
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>
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