Re: POD HD300 and Jack

Cristiano Alessandro <cristianoale@xxxxxxxxxx> · Tue, 27 May 2014 20:49:41 +0200



    Hi Harry,

    
    thank you very very much for helping...

    
                  I have configured Jack from QJackCtl such that the
                  interface I am using is my POD (interface box in the
                  Setup window - interface which is different than the
                  one used in Pulse). Now, I cannot really go on. I
                  guess I have two options to loop my sound back to the
                  speakers (and please correct me if I am wrong): (1)
                  specifying the input and output device in the Setup
                  window appropriately; (2) specifying a proper
                  connection in the Connections window.

                  
                  Option 1. The Input Device and Output Device scroll
                  down list in the setup window 

                
            Yes these are the options that you'll need to use to
              set up the POD as audio device.  Are you sure that ALSA
              supports the POD device? It seems like there might be a
              driver issue, as some other Line6 devices require a custom
              driver to work with Linux: http://sourceforge.net/p/line6linux 
              I hope I'm wrong!
          
        
    I do not really understand the logic of option 1 though. First, why
    are the input and output devices drop down lists shaded if I do not
    select duplex? In other words, if I only want to loop the sound back
    to the speaker, it does not seem that option 1 would work, as I
    cannot select the input not input device. And in any case, if I have
    already selected the interface I am going to use (my POD), what does
    it mean to select input and output device? 

    
    As for the drivers. In fact I have not installed any driver myself.
    The POD gets recognized out of the box in pulse (doesn't it use ALSA
    too?). The first question is: if the problem was the driver, the
    device should not get recognized in the interface drop down list,
    right? But it is. Also, if I have a look at /proc/asound/cards, I
    get

    
    $ cat /proc/asound/cards

    
     0 [Intel          ]: HDA-Intel - HDA Intel

                          HDA Intel at 0xfcaf4000 irq 46

     1 [NVidia         ]: HDA-Intel - HDA NVidia

                          HDA NVidia at 0xfeafc000 irq 17

     2 [PODHD300       ]: line6usb - POD HD300

                          Line6 POD HD300 at USB 8-2:1.0

    
    As you can see, device number 2 is my POD, and strangely it says
    line6usb (which is the name of the device driver in sourceforge).
    Does this mean that the driver is there and that ALSA support the
    device?

    
                Option 2. The POD appears only in the ALSA tab of the
                  Connection window.

                
            The ALSA tab in QJackCtl shows MIDI devices: the MIDI
              component of the POD 300 is probably class-compliant
              (meaning, no special driver required for that part).. 

            
    Again, I do not understand the logic here. I am sorry, I am very new
    to these things. If the ALSA tab shows the MIDI devices, what does
    the MIDI tab show? Also, should my POD be listed in the Audio tab
    (if it was recognized properly)?

    
    Thanks again

    Cristiano

  
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