Re: [Denemo-devel] Compilation on Ubuntu Karmic

[Pietro Battiston]

Il giorno lun, 15/02/2010 alle 18.02 +0000, Richard Shann ha scritto:
> 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.


Richard, I certainly have no competence to teach you about Denemo, but
I'm 100% sure that I compiled with no particular options and I'm
currently able to use denemo through jack (yes, seeing it appearing in
qjackctl for instance, and all those wonderful things). I was wrong only
in the fact that (as reported in a previous email) this happens with
FluidSynth, not portaudio.

Notice however that I only see output audio channels, not MIDI ones...
is this what you're referring to?

Pietro