Re: [ecasound] loop input/output

raf wrote:
> Hi Joel,
> thanks for answering. So this is working as expected.
> Hopefully i can still apply different chain effect to the individual output command !

Raphaël,

You can apply effects (chain operators) individually to chains, whatever the
endpoints.

> It leads me to a config like this for (an oversimplified) two channels mixer :
>
> #------------------------------------------------------------------
> # CHANNELS audio inputs
> #------------------------------------------------------------------
> -a:input1 -f:f32_le,1,48000 -i:jack,system:capture_1 -efh:80 -km:1,20,200,20,1
> -a:input2 -f:f32_le,1,48000 -i:jack,system:capture_2 -efh:80 -km:1,20,200,21,1
>
> # channels outputs
> -a:input1 -f:f32_le,2,48000 -o:loop,micro1
> -a:input2 -f:f32_le,2,48000 -o:loop,micro2
>
> #------------------------------------------------------------------
> # outs
> #------------------------------------------------------------------
> -a:micro1_to_main,micro1_to_ear -f:f32_le,2,48000 -i:loop,micro1
> -a:micro2_to_main,micro2_to_ear -f:f32_le,2,48000 -i:loop,micro2
>
> # audio outputs
> -a:micro1_to_main -f:f32_le,2,48000 -o:jack,system:playback_9 -ea:100 -km:1,0,100,30,1
> -a:micro2_to_main -f:f32_le,2,48000 -o:jack,system:playback_9 -ea:100 -km:1,0,100,31,1
> -a:micro1_to_ear -f:f32_le,2,48000 -o:jack,system:playback_1 -ea:100 -km:1,0,100,40,1
> -a:micro2_to_ear -f:f32_le,2,48000 -o:jack,system:playback_1 -ea:100 -km:1,0,100,41,1

Hmm. This looks similar to Nama's "send bus" feature,
in which the raw or processed signal from all tracks in the bus
get sent to another destination (such as a musician's
monitor) via auxiliary tracks with faders.
 
> I'm experimenting with a 18 mono input tracks, and 5
> stereo out buses with both separate ecasound instances for
> each bus and inputs, or a single one ecasound for all
> (thus the use of loops). Both of them lead to
> approximately the same amount of cpu use.

Cool. If you do it in separate processes, you have
a possibility to change one part without interrupting
other parts. If you don't need that flexibility,
why not do one mighty chain setup?

Probably you're aware that the Ecasound -b parameter (buffersize
in samples) controls the latency of a loop device.

> Soon to release our live band mixer 100% ecasound ;)

Yay

> I'd wish OSC remote control to work as good as midi controls for a perfect setup.

You could submit it as a bug.[1] Perhaps
that will encourage Kai to take a look?

1. http://sourceforge.net/p/ecasound/bugs/

Greetings,

Joel
 
> Cheers,
>
> Raphaël Mouneyres
> 06 89 85 58 81
>
> Le 17 déc. 2013 à 18:22, Joel Roth a écrit :
>
> > Hi Raphaël,
> >
> > See below.
> >
> > Raphaël Mouneyres wrote:
> >> hello,
> >>
> >> i'm having trouble to make loop in/out object work as i understood it.
> >> Please find my ecs file here under.
> >> Ecasound v2.9.0 goes in error saying :
> >> (eca-chainsetup) Unable to connect: Chain "main" is not valid.
> >> Following errors were detected:
> >> (eca-chainsetup) Chain "main" is not connected to any input. All
> >> chains must have exactly one
> >> ... valid input. (2.1-NO-CHAIN-INPUT)
> >> (eca-chainsetup) WARNING: Input "loop" is not connected to any chain.
> >> (3.1-DISCON-INPUT)
> >> (eca-session) Chainsetup loaded from "mixer.ecs" is not valid!
> >>
> >> but to me chain "main" wants to connect to the loop input...
> >> if i remove the "ear" chain, then everything is ok. but then i don't
> >> need the loop object...
> >> i don't get it. could you point me to my mistake ?
> >>
> >> Raphaël
> >>
> >> # ecasound chainsetup file
> >> # one file for all channels & submixes
> >>
> >> # general
> >> -b:64 -r:50 -z:intbuf -z:db,100000 -n:"channels" -X -z:noxruns
> >> -z:nopsr -z:mixmode,avg -G:loop,channels,no_transport
> >>
> >> #------------------------------------------------------------------
> >> # CHANNELS audio inputs for MAIN BUS
> >> #------------------------------------------------------------------
> >> -a:input -f:f32_le,1,48000 -i:jack,system:capture_1
> >>
> >> # channels outputs
> >> -a:input -f:f32_le,2,48000 -o:loop,micro
> >>
> >> #------------------------------------------------------------------
> >> # outs
> >> #------------------------------------------------------------------
> >> -a:main -f:f32_le,2,48000 -i:loop,micro
> >> -a:ear -f:f32_le,2,48000 -i:loop,micro
> >
> > I think Ecasound ought to accept your syntax, since it
> > follows the rule "every chain has one input and one output,"
> > however, this is what you need to change:
> >
> > -a:main,ear -f:32_le,2,48000 -i:loop,micro
> >
> > Cheers,
> >
> > Joel
> >
> >> # audio outputs
> >> -a:main -f:f32_le,2,48000 -o:jack,system:playback_9
> >> -a:ear -f:f32_le,2,48000 -o:jack,system:playback_1
> >>
> > --
> > Joel Roth
> >
> >
> >
> > ------------------------------------------------------------------------------
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>

-- 
Joel Roth
  
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