Re: Problems recording through Jack

Darcy Kahle wrote:

> What I am trying to do is record midi files created in Rosegarden as a wave
> file under Ardour. I have gotten it to the point where I have both apps
> launched at the same time, and I press play under Ardour, play starts under
> Rosegarden, and I hear the piece that I am trying to record. The only thing
> that gets recorded, is the heartbeat that Ardour generates. I know that I am
> doing something wrong. Either I have started Jack up incorrectly, I am not
> setting Ardour up to record properly, or Rosegarden is not playing through
> Jack. Or a combo of all three. I believe that the issue is with Ardour,
> because of the output I get when I launch it (below). Please note, that I
> launch Rosegarden through sudo first, then I launch ardour, also through
> sudo.

What are you using for your MIDI sounds?  In other words, what MIDI 
device do you have configured in Rosegarden?  You need to have the audio 
playback of what is coming from Rosegarden routed to the input of 
Ardour.  If you use qjackctl, you should be able to visibly see how your 
audio streams are being routed.  If you aren't using qjackctl, why not? 
  It'll make your life a LOT easier.

Also, check on what the inputs are for your track in Ardour.  If they 
aren't set for the correct inputs (which you can determine from 
qjackctl), you will get an empty track.  This can especially be a 
problem if your audio hrdware has multiple I/O connections (like some of 
the higher end cards like those from M-Audio).  If Rosegarden is sending 
MIDI to an external hardware module that is playing back to the inputs 
of your soundcard, you will probably need to have your track input 
connections on 1 and 2.

It's also recommended that you use a kernal with capabilities patched 
into it, so you can use jackstart (qjackctl will use jackstart if it's 
available) to run all of your jackified applications as a normal user 
instead of as root.

-- Brett
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