[PlanetCCRMA] PulseAudio, ALSA and Jack -- Where's The Forest? I Only See Trees.

[kelly hirai]

you should look at the jack_* family of commands:
jack_alias             jack_lsp               jack_simple_client
jack_connect           jack_metro             jack_transport
jack_disconnect        jack_midiseq           jack_transport_client
jack_evmon             jack_midisine          jack_unload
jack_freewheel         jack_monitor_client    jackd
jack_impulse_grabber   jack_netsource         jackrec
jack_load              jack_showtime

kelly at sundog /home/kelly/xen $ jack_connect -h
(null): JACK Audio Connection Kit version 0.116.2

usage: (null) [options] port1 port2
Connects two JACK ports together.

         -s, --server <name>   Connect to the jack server named <name>
         -v, --version         Output version information and exit
         -h, --help            Display this help message

For more information see http://jackaudio.org/

i know not having proper man pages bites (you have to run the command not 
knowing the effects) but they do provide hints.

kelly


On Mon, 16 Mar 2009, David Ford wrote:

> Hi Sean - please keep the questions going .
> (from one of those who sit there wishing someone would ask.)
> David
>
> Sean Beeson wrote:
>> I wonder if anyone guessed what this post is about. :-) I didn't get
>> through Discrete Mathematics not being the one to raise my hand to ask
>> the stupid questions no one else would ask, but were dying to know.
>>
>> All I can find as far as user docs for ALSA and Jack is documentation
>> on programming with their APIs. I really can't find much on qjackctl
>> either as far as writing bash scripts to get programs to connect to
>> Jack. I can't find any man pages for any of them either. I of course
>> get the few command line switches one can get with --help, but there
>> seems to be more to, say, Jack.  Zynaddsubfx tries to connect to Jack,
>> but fails half way and, although it shows up in Jack, it never makes
>> the connection to Jack's system playback ports and I have to manually
>> connect them each time. Is there documentation on how I can connect
>> these with a bash command? I see that Hydrogen and Audour query ALSA
>> for information. Am I only left with the API docs to figure them out
>> and how else I can utilize them? Is everyone figuring out how to tweak
>> and fine tune Jack by trial and error? I have SELinux turned off and
>> killed any daemons, like Iptable that start up by Fedora default.
>> Where do I go next? I am basically using Planet CCRMA defaults,
>> knowing I know nothing about xruns other than you don't want them. I
>> picked off some scripts from the Musix Live CD that I am just now
>> digesting, but my Spanish is really poor and I am missing some of the
>> points in the comments. :-) Basically, could anyone give me some
>> direction on resources on understanding ALSA and Jack and their
>> relationship with each other and how other programs know how to
>> connect to them? Rosegarden gets most of them, but misses a few at
>> times also.
>>
>> And, I think I am not alone on this, now that PulseAudio has been
>> introduced I am really confused on how it will effect ALSA. Just when
>> ALSA became a standard people are now claiming PulseAudio is the way
>> forward. Basically, where do I go to understand what, how or If they
>> will have an impact on audio on Linux? Usually, I can go to my
>> Safaribookonline account and find the exact thing I need with security
>> over ssh or how to test and deal with performance with Postgres or
>> Apache in an O'reilly book, but for ALSA or Jack, and now PulseAudio,
>> there just doesn't seem to be anything. Where is the
>> ALSA/Jack/PulseAudio forest? I see some trees because I have some
>> menus to go to and a few programs with some command line switches to
>> type. How do I find out about the future of it, if I do find it?
>>
>> I know this is sort of a jumble of questions. If you can give me
>> specific advice on getting better performance that would be great (I
>> should post something that is a little more specific to my set-up I
>> guess for that), but some pointers on resources to really understand
>> how all of this works is really what I am getting at here.
>>
>> My set-up with the fc10 64-bit Planet CCRMA at Home is basically
>> working really well and the USB M-Audio FTPro i am using sounds so
>> sweet, but I am ready to go to the next step of my understanding of
>> the technical side of things other than making some music. :-o
>>
>> Thanks,
>>
>> --Sean
>>
>>
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