Re: using Jack an interface to ecasound

Tweed <tweed@xxxxxxxxxxxxxxxxxxx> · Tue, 17 Jan 2017 06:17:26 -0500



    On 01/17/2017 04:35 AM, john gibby
      wrote:

    
      Sound is via ALC 1150 chipset; I don't think
        that's the problem.  When I go directly from pianoteq to alsa
        there's no problem; can use even a 64 sample buffer.  Maybe I
        need a little help in killing the default jack server and
        starting it back (with dummy back end ) using direct jackd
        command line instead of using qjackctl?  Then I think it may
        keep my specified buffer size.  Am Linux newby, takes a little
        work! :)
      

        On Jan 17, 2017 4:23 AM, "Jeanette C."
          <julien@xxxxxxxxxxx>
          wrote:

          Jan 17
            2017, john gibby has written:

            ...

            
                When qjackctl brings up

                the jack server, the buffer size gets overridden to
                1024; I see the message

                in the log. What am I doing wrong?  Is Jack the wrong
                approach, when it is

                ecasound, not jack, that writes to alsa?

              
            Hi John,

            it appears that your soundcard is the problem. I've only
            started JACK on

            the commandline or through a dedicated start script, not
            using qjackctl

            or other JACK-supplied tools. But if you give a buffersize
            to JACK it

            will honour that buffersize, if the soundcard can stand it.
            I haven't

            seen an application before that couldn't honour JACK's
            buffersize,

            whatever it is. Especially Ecasound can certainly go down to
            64 samples.

            
            What soundcard do you have? Have you tried starting JACK for
            your

            soundcard on the commandline and see what happens?

            jackd --timeout 4500 -R -d alsa -d hw:0 -p 128

            Assuming that your soundcard is the first one (hw:0).

            
            I have no experience with Pianoteq, but since it is meant as
            a realtime

            app, it should make sure that its sounds are played back
            without delay

            or with minimal delay. 128 and even 64 samples aren't that
            uncommon.

            ...

            
            Best wishes,

            
            Jeanette

            
            --------

            When you need someone, you just turn around and I will be
            there <3

          
      _______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user

    
    maybe a jackdbus thing?  if you're using jack2, what does
      "jack_control status" show?
    if it says "started",  do "jack_control stop" then try your jack
      command/qjackctl.
    

    -- 
www.the-temp-agency.com/lollipop-factory
  

_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user