problem using audacity with jack

  • gilles
Posted: Mon, 01/14/2008 - 16:26
hi, first of all, let me apologize for my poor english. Then, maybe I should introduce myself : a newbie , who decided a few weeks ago to look at 64studio, because he wanted to help his son to learn music, and thought that rosegarden could be a good way for that. I'm a classical musician playing cello, but I can't play piano. Rosegarden really helped me to write exercices for my son, and is about to become a natural way for me to teach music to my son. I use for that an old computer PIII 1Ghz 512 Mo (that seems to be enough) , a Yamaha digital piano with a USB-MIDI adapter , and a audio soundblaster live card. First, I noticed some trouble with Jack and "xruns", but finally, reading FAQ and testing, all got right. Many, many thanks to the developers for that amazing job. So ... of course, I decided to look around to improve my knowledge and deal with audio recording. Here we are. Rezound, timemachine, ardour , hydrogen : all right. I can see them in jack control panel and can establish links like explained in documentation. I'm not an expert, but I can play some music or record from a microphone or an external source. But Audacity seems to be more versatile : first, It begins to load. But a few seconds later, jack fails without message in the text window. Then, rosegarden hang, claiming jack is out of order. So I tried to close all applications using jack and load Audacity alone with jack. Same result. Does somebody can confirm this is abnormal and not a known problem ? Does somebody know where can I have retrieve jack log or debug before it died? Does somebody can help me ? Many thanks from France. Gilles
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Audacity jack support

  • wayneward
  • 06/13/08
  • Fri, 06/27/2008 - 22:03
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www.wayneward.co.uk/blog/ Cant understand why they dont package it with jack support I put rezound on and that plugs into jack no problem Its a pain shutting down all your apps down that are setup plugged into jack to use audacity - if you dont shut down jack and other jack connected apps as soon as you start audacity it kills jack and other connected programs rezound is the way to go with studio 64 unless you fancy a compile from source or a gentoo install! :-)

hi, "You do not need to

  • gilles
  • 01/13/08
  • Thu, 01/17/2008 - 16:33
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hi, "You do not need to select portaudio in qjackctl, just start qjackctl and then audacity and look at the connections in qjackctl. You will notice nothing is shown at first." Here is the problem : That's not the behaviour I notice. On my system, But if I try to use audacity after starting jack, jack process crashes (exactly as if I was killing it with a system command issued by root user : kill -9 ). So, I can't see the "strange behaviour" you notice : jack crashes before I can see it. Maybe I did a mistake ? where ? So, to be sure, I decided to reinstall 64studio from the last iso : I have downloaded it yesterday, and I have installed it on another PC (exactly same hardware as the first one) And ... exactly same result !!! thank you for your help. Don't spend too much time for me : Your advice is right. I can use rezound and timemachine. That's enough to complete the work I need to do :-)

Hi gilles. I have now got

  • fake
  • 01/12/08
  • Wed, 01/16/2008 - 18:37
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Hi gilles. I have now got qjackctl and audacity running without problems, well almost! You do not need to select portaudio in qjackctl, just start qjackctl and then audacity and look at the connections in qjackctl. You will notice nothing is shown at first. Now press record on audacity and you should now see a connection show up in the gui. Mine says PortAudio-6939 as the in and out ports. Its a strange behavior thing because it means you cant connect up in jack beforehand???? I now realize why I don't use it for recording with jack . You could also check out rezound as that works with jack or as you say if its just for a capture then timemachine should be ok. Hope that helps and is not confusing. fake

hi, How can I know if

  • gilles
  • 01/13/08
  • Tue, 01/15/2008 - 18:14
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hi, How can I know if portaudio is correctly installed ? result of "dpkg -l |grep portaudio" is : libportaudio2 19+svn20071022-2~etch1 Portable audio I/O - shared library result of "dpkg -l|grep audacity" is : audacity 1.3.3-1~etch1 A fast, cross-platform audio editor result of "dpkg -l|grep jack" is : jack-rack 1.4.5-1+cvs070713~bpo.1 LADSPA effects "rack" for JACK jackd 0.103.0-6~bpo.1 JACK Audio Connection Kit (server and exampl jackeq 0.4.1-1 routes and manipulates audio from/to multipl libjack0 0.103.0-6~bpo.1 JACK Audio Connection Kit (libraries) libjack0.100.0-0 0.103.0-6~bpo.1 JACK Audio Connection Kit (libraries) libjackasyn0 0.11-2 The Asynchrounous JACK Library qjackctl 0.2.22-2~bpo.1 User interface for controlling the JACK sound within jack console settings, I can select "portaudio" , instead of "alsa" , then jack doesn't start with an error message : 18:38:38.331 JACK is starting... 18:38:38.337 jackd -R -p128 -dportaudio -r44100 -p256 18:38:38.421 JACK was started with PID=6440 (0x1928). jackd: unknown driver 'portaudio' 18:38:38.631 JACK was stopped with exit status=1. 18:38:40.597 Could not connect to JACK server as client. So, maybe you could be right : "unknown driver portaudio" ... Can you confirm you can use audacity with jack ? And if yes, can you look at your setup in jack and audacity and forward it ? thanks a lot for your help. On an other hand, I will follow your advice : Ardour seems to work fine. I will try to understand that. I was just afraid with the first screen : it looks complicated for me ! I'm not a specialist in audio processing :-) Maybe also, "timemachine -f wav" could be enough for me :-)

Hi Gilles. Do you have

  • fake
  • 01/12/08
  • Mon, 01/14/2008 - 19:51
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Hi Gilles. Do you have portaudio installed? I think that with audacity it uses portaudio as its jack client, sorry I cant help much otherwise. A suggestion though, have you tried Ardour for recording? I find it much more versatile with its routing in jack. I use Ardour for recording everything, even a Rosegarden session and then Audacity for editing and compressing to ogg. fake