Re: [Denemo-devel] Compilation on Ubuntu Karmic

[Richard Shann]

On Mon, 2010-02-15 at 18:52 +0100, Pietro Battiston wrote:
> Il giorno lun, 15/02/2010 alle 16.34 +0000, Richard Shann ha scritto:
> > On Mon, 2010-02-15 at 10:55 +0100, Pietro Battiston wrote:
> > > Il giorno lun, 15/02/2010 alle 09.08 +0000, Richard Shann ha scritto:
> > ...
> > > > > Still, in my opinion, the current situation is not terrible, I will 
> > > > > just
> > > > > change the default.
> > > > ?? can that be done at packaging stage? (That is, you will build the
> > > > executable with jack and fluidsynth enabled and then get it to start
> > > > doing output to fluidsynth by default, ignoring jack???)
> > > 
> > > Uhm... well, that's what is happening now, though I admit I totally
> > > ignore the details.
> > 
> > I think that would be ok. Those who use jack have to set things up, and
> > so setting the Denemo prefs to use jack would be expected by them.
> > However ...
> > 
> > > The package I will soon push to debian, compiled with all default
> > > options, patched only to change the default audio driver and midi/audio
> > > output (see attachment), runs by default with portaudio and pulseaudio;
> > > then, if the user runs jackd and selects "jack" as audio driver (and
> > > restarts), it uses jack.
> > This I don't understand. I start with a simple Debian Stable
> > installation. If I set pulseaudio in the prefs I hear nothing - the
> > output is
> > 
> > fluidsynth: error: Couldn't find the requested audio driver: pulseaudio
> 
> Thank you very much for the remark: I tested denemo on debian, but I
> only tested playback on Ubuntu... where pulseaudio is the default, and I
> incorrectly assumed that gnome in general had pulseaudio, while under
> debian it doesn't, as Till already wrote.
> 
> > 
> >  I hear things if I set oss. So it seems that a naive user installing
> > the denemo package and just starting denemo will hear no output unless
> > he has installed pulseaudio (whatever that is). Perhaps when I set oss I
> > am getting a side effect of some package that I have installed for some
> > other reason?
> 
> No, it's really my fault...
> 
> I will replace "pulseaudio" with "alsa", since if pulseaudio is running,
> "alsa" just runs very disturbed (and that may be a pulseaudio bug, maybe
> fixed in next Ubuntu), while if it is not running, "pulseaudio" will not
> work at all...
> 
> > Also, just reading your patch, it seems that the lines
> > 
> >  #ifdef _HAVE_JACK_
> >    ret->midi_audio_output = Jack;
> >  #endif
> > 
> > have been left in and (as you have compiled with --enable-jack) I would
> > have thought it would default to Jack midi output.
> 
> The point is I didn't compile with --enable-jack, I gave no configure
> options at all (and --enable-jack defaults to NO): if I understand
> correctly - but I may just be showing my huge ignorance of denemo
> architecture - I'm able to use jack through portaudio, not through
> direct denemo support (does it make sense?).

I don't think that makes sense, portaudio is just going straight for the
audio device I think.
When you compile with --enable-jack you get clients appearing in the
jack world, and you can connect your staffs to them and do all sorts of
wonderful things, but you have to do them, they don't just happen.
So I think you need to build it with jack enabled, but avoid it default
to using it.
I think we should probably make this the default inside denemo -
Jeremiah, Nils is that right?

Richard




> 
> > 
> > It is quite alright to ignore all my comments if I am just barking up
> > the wrong tree. I am really quite lost in this deluge of drivers and
> > outputs and so on.
> 
> I can understand you!
> 
> > If you are happy that someone installing and running
> > denemo will get something working straight away then I am sure that is
> > fine.
> 
> "alsa" as default is a reasonable solution
> 
> Pietro
> 
> 
> 
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