30 Aug
2010
30 Aug
'10
3:08 p.m.
On Mon, August 30, 2010 5:48 am, Kim Therkelsen wrote:
Why is it better than loading it using the ALSA LADSPA plugin loader
module?
To me it seems better to load it into ALSA because it does not depend on
whether PulseAudio is used or not.
If it should be used in different Linux based operating systems I can not
always rely on PulseAudio being present.
The idea is that I perform the same processing no matter what user
application is used to playback the audio/video.
The plugin must receive the raw six (or eight) channel audio PCM stream.
So I do not want to make the DSP processing specific to some special
application only.
It's a noble goal but as you are attempting to cater to such a varied
range of systems that it is hard to recommend a perfect solution. You
should really isolate the core requirements and minimum apps that it will
work with then it will be easier for people to make a suggestion that fits
your needs.
--
Patrick Shirkey
Boost Hardware Ltd.
I have
tried loading the LADSPA-module using the module-ladspa-sink in
PulseAudio but I am not sure this is the best solution.
It is the recommended solution if you are using PA for your sound
server. 2) Must
be able to process stereo and multichannel (5.1/7.1) formats.
I
need the multichannel formats to perform binaural
downmixing to
stereo.
I'm not sure how the dolby multichannel support is in ALSA. It may
depend
on the internal capabilities of the device.
So it is important that I can receive
multichannel audio and mix it
down
to stereo and output it to a stereo soundcard.
This may better handled in app.