Re: [Denemo-devel] Compilation on Ubuntu Karmic

[Pietro Battiston]

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?).

> 
> 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