Subject: Re: [ecasound] Jack and some other issues
From: Jeremy Hall (jhall_AT_uu.net)
Date: Thu Mar 14 2002 - 13:48:50 EET
yeah Kai wrote a cryptic thing a few months back, I'll see if I can dig it
up for you. You want jack_alsa,something and you'll get
ecasound:something_1, ecasound:something_2 etc.
You probably want 44100, not 41000 in your rate calculations. I usually
use jack_alsa,in for capture ports and jack_alsa,out for playback
ports. Then I can do jack_connect alsa_pcm:in_1 ecasound:in_1 (this
already happens for you btw, but you can add more) like alsa_pcm:in_3
ecasound:in_1 and alsa_pcm:in_4 and ecasound:in_2 if you are using
channels 3 and 4, for example.
I happen to believe the possibilities for specifying jack ports are
limited, but I cannot think of a better method right now.
anyway that'll get you started. I think there is a jack_mono and
jack_generic too
You can type aio-register at an interactive prompt and look for
jack-related entries for some cryptic hints, and if you're really excited
about it, you can go read the sources in libecasound/plugins. I'm not
really fond of this approach, but it has proven useful for me i the past.
_J
In the new year, Anthony wrote:
> I did not enable arts support in the config so methinks I shouldn't
> see the following error?
>
> # ecasound -i:null -pn:metronome,60 -o:alsa,dplug
> ****************************************************************************
> * ecasound v2.1dev8 (C) 1997-2002 Kai Vehmanen
> ****************************************************************************
> - [ Session created ] ------------------------------------------------------
> (eca-static-object-maps) dlsym() failed; /usr/local/lib/ecasound-plugins/libaudioio_arts.so: "/usr/local/lib/libecasound.so.8: undefined symbol: audio_io_interface_version".
>
> Now, I'm trying to figure out jack. It works with ardour, latest CVS version.
> When I try:
>
> # jackd -R -v -d alsa -d delta -r 41000 -p 64 -H
>
> # ecasound -b:64 -sr:41000 -i:null -pn:metronome,60 -o:jack,alsa_pcm:out_1
>
> I get:
>
> (eca-control) ERROR: Connecting chainsetup failed: "Enabling chainsetup: AUDIOIO-OSS: OSS-device doesn't support SNDCTL_DSP_SETTRIGGER (16)"
>
> Am I using the right naming scheme here? I'm having a hard time
> finding much on the lists regarding eca+jack. Maybe I'm getting ahead
> of myself here? Could you explain the syntax or point me to something
> that does. Thanks very much.
>
> --ant
>
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