Re: [Denemo-devel] Newbie getting MIDI K/B to work with ALSA and qjackctl

[Philip Rhoades]

Richard,


On 2014-01-19 01:47, Richard Shann wrote:
> On Sun, 2014-01-19 at 01:15 +1100, Philip Rhoades wrote:
> > >
> > > In the Edit->Change Preference->Audio/MIDI tab under MIDI Backend,
> > > Input
> > > Device. The MIDI backend should be PortMidi and you device should
> > > appear
> > > under the drop down menu for Input Device.
> >
> >
> > Under that drop down menu I have:
> >
> >    ALSA
> >    JACK
> >    none
> >
> >
> > > I think this is the first thing to establish - is your device
> > showing
> > > up
> > > in that drop down menu? (Clean, freshly booted machine with device
> > > plugged in).
> >
> >
> > Doesn't look like it - no sign of PortMidi - there is only
> > "PortAudio"
> > in the Audio Backend.  I installed portmidi-tools and ran pmdefaults:
> > when I select the keyboard as input I can see responses on the
> > virtual
> > LED when I press keys (but I knew this was working anyway - it is
> > only
> > getting the input into Denemo that is a problem).
>
> There are two panels, one Audio Backend then below it MIDI backend.
> I think perhaps you looked under the Input Device of the Audio Backend.


No, the second panel has:

  Audio Backend
    PortAudio
    JACK
    none

  Output Device
    Lots of ALSA devices

the third panel has:

  MIDI Backend
    ALSA
    JACK
    none


> But this already shows a difference from what I see - you have no
> PortAudio option (which I have) and you *do* have ALSA and JACK options
> which I don't have.


Hmmm . .


> I don't know too much about it, but my guess is that this isn't the
> plain vanilla build but one with JACK and ALSA enabled and PortAudio
> disabled. IIRC it is Edgar Aichinger who builds for Fedora.
> You could try the binary - this you can install without root 
> permissions
>  http://denemo.org/downloads/denemo-1.1.0-0.linux-x86
>
> I'm not able to run this myself, but I believe it works fine on other
> distros.


OK but there is another issue now - when I boot with the MIDI K/B 
plugged in, it seems to rearrange the audio cards on the computer or 
something because then I can't produce any sound at all!  If I plug the 
K/B in after booting, I  still have sound and can at least get life out 
of the K/B for other things - just not for use as input to Denemo . .

In any case, it is a pain having to reboot the server all the time - I 
will try the same exercise on a laptop, which has the same OS on it but 
of course doesn't have all the stuff connected to it that the server 
does . . anyway, I'll check out your link and see if that helps at all.

Thanks for the help!

Regards,

Phil.
--
Philip Rhoades

GPO Box 3411
Sydney NSW      2001
Australia
E-mail:  address@hidden