[LAU] ANN: CMKeyboard

[Bill Gribble]

I have done some proof of concept tests with pyopencl that look interesting.  

There are practical problems: you add a whole other "domain" to process in, in addition to Python-world and Jack-world.  You have deployment issues with the OpenCL libs for different GPU vendors. The wide SIMD architecture of GPUs is really only helpful for certain audio ops like convolution, or very wide banks of identical processing. And if you are using the card for graphics, there may be unpredictable interactions.

Still worth exploring though, and a "cl~" processor for my system is definitely on the todo list. 

Thanks,
Bill Gribble

On Dec 10, 2012, at 6:19, "Patrick Shirkey" <pshirkey at boosthardware.com> wrote:

> 
> On Mon, December 10, 2012 9:06 am, Bill Gribble wrote:
>> Patrick, interesting stuff!  I am about to push an early version of my
>> current project to github -- python and clutter implementing a puredata
>> knockoff (with python data types and evaluator).
>> 
>> I've found it to be a good combo so far, using multiprocessing to separate
>> engine, UI, and DSP (in C extension).
>> 
> 
> 
> That is my experience with the combination too. I have also found it works
> nicely as an addition to a gtk3 interface using the embed() option. That
> gives a gtk3 wrapper with direct cairo support while allowing easy access
> to clutter, opengl and the advanced gesture and animation support. It's a
> pretty powerful combo.
> 
> One thing I am still working on is getting direct access to the GPU for
> additional processing grunt.
> 
> 
> 
> 
>> Thanks,
>> Bill Gribble
>> 
>> On Dec 9, 2012, at 16:20, "Patrick Shirkey" <pshirkey at boosthardware.com>
>> wrote:
>> 
>>> 
>>> On Mon, December 10, 2012 3:37 am, Louigi Verona wrote:
>>>> Hey Patrick!
>>>> In what way would you say this is different from JACK Keyboard?
>>> 
>>> First it uses alsa midi through the alsaseq library.
>>> Second it is written in python3.
>>> Third it uses the Clutter "opengl" UI toolkit.
>>> I'm not sure if jack keyboard supports 128 midi keys.
>>> 
>>> CMKeyboard is not intended to replace jack keyboard. It's about getting
>>> some traction using Python3 and Clutter.
>>> 
>>> Clutter and Python are two under utilised options in LAD. Not sure why
>>> Python is not so popular considering how many professional and highly
>>> successful AV projects have been built with it but Clutter seems to have
>>> been off the radar for a while. Maybe now that the new touch interfaces
>>> are arriving in the market this year we will see a pick up in Clutter
>>> projects for LAD applications.
>>> 
>>> 
>>> 
>>>> On Dec 9, 2012 7:28 PM, "Patrick Shirkey" <pshirkey at boosthardware.com>
>>>> wrote:
>>>> 
>>>>> Announcing CMKeyboard - Clutter MIDI Keyboard
>>>>> 
>>>>> http://djcj.org/cmkeyboard
>>>>> 
>>>>> CMKeyboard is a 128 note ALSA MIDI virtual piano keyboard spanning
>>>>> from
>>>>> C-1 to G9 written in python3 and taking advantage of the latest
>>>>> Clutter
>>>>> (>1.12.2) features to enable scrolling and opengl goodness. It is a
>>>>> stand
>>>>> alone program which can also be embedded into other python3
>>>>> applications
>>>>> as a class library. It uses code from the very handy pyclutter-widgets
>>>>> project for the rounded rectangles of the key buttons.
>>>>> 
>>>>> The code demonstrates use of Clutter.ScrollActor(),
>>>>> GtkClutter.Embed(),
>>>>> layering of multiple clutter actors, handling of events including:
>>>>> "button-press-event" & "key-press-event".
>>>>> 
>>>>> Suggestions for features and improvements welcome.
>>>>> 
>>>>> 
>>>>> Enjoy!
>>>>> 
>>>>> 
>>>>> --
>>>>> Patrick Shirkey
>>>>> Boost Hardware Ltd
>>>>> _______________________________________________
>>>>> Linux-audio-dev mailing list
>>>>> Linux-audio-dev at lists.linuxaudio.org
>>>>> http://lists.linuxaudio.org/listinfo/linux-audio-dev
>>>>> 
>>>> 
>>> 
>>> 
>>> --
>>> Patrick Shirkey
>>> Boost Hardware Ltd
>>> _______________________________________________
>>> Linux-audio-user mailing list
>>> Linux-audio-user at lists.linuxaudio.org
>>> http://lists.linuxaudio.org/listinfo/linux-audio-user
>> 
> 
> 
> --
> Patrick Shirkey
> Boost Hardware Ltd
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