2 Nov
2011
2 Nov
'11
5:23 a.m.
Hi, I'm working on an a project that I intend to do using the STK in a
callback style, but am hoping I can prototype the architecture in python
until I've figured out the various components and their responsibilities
and dependencies. Does anyone know of any kind of python library ( or
method? ) that would let me simulate the way callback based STK apps using
RTAudio work? IE I want to have a python master callable that gets called
once per audio sample and has a way of sending out it's results to the
audio subsystem.
I've found a bunch of python audio libs but it doesn't seem like they work
that way, maybe I'm missing something?
thanks!
Iain
2 Nov
2 Nov
11:39 a.m.
On Wed, Nov 2, 2011 at 12:23 AM, Iain Duncan <iainduncanlists(a)gmail.com> wrote:
Hi, I'm working on an a project that I intend to
do using the STK in a
callback style, but am hoping I can prototype the architecture in python
until I've figured out the various components and their responsibilities and
dependencies. Does anyone know of any kind of python library ( or method? )
that would let me simulate the way callback based STK apps using RTAudio
work? IE I want to have a python master callable that gets called once per
audio sample and has a way of sending out it's results to the audio
subsystem.
I've found a bunch of python audio libs but it doesn't seem like they work
that way, maybe I'm missing something?
the obvious choices would be the python wrappers for JACK and/or PortAudio.
note, however, that the chances of using Python for per-sample
processing at low latency without intense dropouts are low.
11:40 a.m.
to clarify a bit more: although callback style APIs do exist (even for
*nix systems), AFAIK STK is one of the very few APIs that does
sample-by-sample processing.
4 Nov
4 Nov
6:36 p.m.
2011/11/2 Iain Duncan <iainduncanlists(a)gmail.com>om>:
Hi, I'm working on an a project that I intend to
do using the STK in a
callback style, but am hoping I can prototype the architecture in python
... ... ...
until I've figured out the various components and their responsibilities and
dependencies. Does anyone know of any kind of python library ( or method? )
that would let me simulate the way callback based STK apps using RTAudio
work? IE
You could implement the callbacks (and link it to STK) with Cython.
(not CPython)
This would require you to write a Cython-Header file for the called
STK functions.
Cython works very well for this, although you have to learn it, because
it's neither real C nor real Python, but it's close.
With some attentiveness, you could write rt- functions in Cython,
because they compile to pure C / binary.
I want to have a python master callable that gets
called once per
audio sample
No, Once per audio buffer, consisting of many (e.g. 128) samples.
That's a better choice, usually, even if you do sample-by-sample
processing within the function/callback.
and has a way of sending out it's results to the
audio
subsystem.
I've found a bunch of python audio libs but it doesn't seem like they work
that way,
Note:
Don't use python threads (as implemented in CPython), they do not
work for this.
You might have more luck with the more recent multiprocessing module,
( http://docs.python.org/library/multiprocessing.html )
It was introduced to circumvent some of PythonThreads limitations.
--
E.R.
6:43 p.m.
On Fri, Nov 4, 2011 at 10:36 AM, Emanuel Rumpf <xbran(a)web.de> wrote:
thanks for the tips!
iain
2011/11/2 Iain Duncan
<iainduncanlists(a)gmail.com>om>:
I was wondering about that, has anyone here had real success with Cython?
Hi, I'm working on an a project that I intend
to do using the STK in a
callback style, but am hoping I can prototype the architecture in python
... ... ...
until I've figured out the various components and their responsibilities
and
dependencies. Does anyone know of any kind of
python library ( or
method? )
that would let me simulate the way callback based
STK apps using RTAudio
work? IE
You could implement the callbacks (and link it to STK) with Cython.
(not CPython)
This would require you to write a Cython-Header file for the called
STK functions.
Cython works very well for this, although you have to learn it, because
it's neither real C nor real Python, but it's close.
With some attentiveness, you could write rt- functions in Cython,
because they compile to pure C / binary.
I want to have a python master callable that gets
called once per
audio sample
No, Once per audio buffer, consisting of many (e.g.
128) samples.
That's a better choice, usually, even if you do sample-by-sample
processing within the function/callback.
oops, yeah, I realizes I was mistaken there after sending it. That's what
I'm doing, thanks
and has a way of sending out it's results to
the audio
subsystem.
I've found a bunch of python audio libs but it doesn't seem like they
work
that way,
Note:
Don't use python threads (as implemented in CPython), they do not
work for this.
You might have more luck with the more recent multiprocessing module,
( http://docs.python.org/library/multiprocessing.html )
It was introduced to circumvent some of PythonThreads limitations.
4763
days inactive
4765
days old
linux-audio-dev@lists.linuxaudio.org
4 comments
3 participants
participants (3)
-
Emanuel Rumpf -
Iain Duncan -
Paul Davis