Re: [ecasound] Newcomer problem with loop device

On Wed, Aug 24, 2005 at 10:36:06AM +0300, Kai Vehmanen wrote:
> On Wed, 24 Aug 2005, Stuart Allie wrote:
> >Erno Palonheimo wrote:
> >>I am having trouble with loop device. The setup is as follows:
> >>% ecasound \
> >>-a:master -i:loop,1 -o:jack_auto,alsa_pcm \
> >>-a:tape -i:jack_generic,audio_in -o:loop,1 \
> >>-a:mic -i:jack_auto,alsa_pcm -o:loop,1
> >ecasound \
> >-a:master -i:loop,1 -o:jack_auto,alsa_pcm \
> >-a:tape -i:jack_generic,audio_in \
> >-a:mic -i:jack_auto,alsa_pcm \
> >-a:tape,mic -o:loop,1
> Yep, the above is the correct way to do it.
> The basic concept for connecting chains is: to connect an input or output
> to multiple chains, you have to 1) select multiple chains, and 2) add the
> input/output.
> With loop devices, this is a bit tricky, as you don't want to create
> multiple "-o:loop,1"'s (using Erno's example here), but instead route all
> the chains through the one "-o:loop,1" object.
> If you replace "-o:loop,1" with "-o:jack", Erno's setup is ok to ecasound
> -- it's a normal use case to have separate jack output objects in
> ecasound, connected to different input chains.
> Janne Halttunen actually posted a patch in 2002/Dec that adds chainsetup
> "preparsing", which basicly automatically fixes above type of errors. But
> as it was a generic version that merges all objects that have identical
> label (like "-o:loop,1", "-o:jack"), I couldn't commit it the the
> mainline back then.
> But, but, thinking about this again, I guess we really should fix this,
> specifically for the case of loop-devices. I'm a bit worried about adding
> multiple ways to do the same stuff (after the fix, both Erno's and
> Stuart's version would work), but I guess in this case making the fix
> actually causes less confusion. What do you guys think?

I think you should not fix this. I don't think it's broken. 'fixing' it
would hide the way ecasound works. I know I've made similar mistakes in
the past, but once ecasound's operation is understood it makes sense, at
least to me. just my $.02

-- 
Eric Dantan Rzewnicki  |  Systems Administrator
Technical Operations Division  |  Radio Free Asia
2025 M Street, NW  |  Washington, DC 20036  |  202-530-4900
CONFIDENTIAL COMMUNICATION
This e-mail message is intended only for the use of the addressee and
may contain information that is privileged and confidential. Any 
unauthorized dissemination, distribution, or copying is strictly 
prohibited. If you receive this transmission in error, please contact
network@email-addr-hidden.
-------------------------------------------------------
SF.Net email is Sponsored by the Better Software Conference & EXPO
September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
_______________________________________________
Ecasound-list mailing list
Ecasound-list@email-addr-hidden
https://lists.sourceforge.net/lists/listinfo/ecasound-list