[linux-audio-user] Audacity will not work if JACK is running.

[Hector Centeno-Garcia]

Christoph Eckert wrote:

>>Audacity is not JACK-enabled: you need to stop JACK running to be
>>able to use Audacity. Audacity looks to access the soundcard but
>>can't because JACK is using it when it is running.
>>    
>>
>
>AFIR there have been rumors that Audacity CVS has JACK support?
>
>
>Best regards
>
>
>ce
>
>  
>
I got Audacity to use jack some days ago. You can use the stable release 
and follow these instructions that I found (originally posted by Linton 
Smith), just replace Audacity-1.2.3 for Audacity-1.2.4b (the latest stable):

/> To make it work:
/>/ 
/>/ 1. download the latest pa_snapshot_v19 from the PortAudio website.
/>/ 2. Unpack this into Audacity-1.2.3/lib-src/
/>/ 3. Delete the old portaudio-v19 directory
/>/ 3. Rename the portaudio directory portaudio-v19
/>/ 4. configure audacity to build with portaudio-v19
/>/ 	./configure --enable-portaudio=v19
/>/ 5. build audacity
/>/ 	make
/>/ 6. optionally install audacity
/>/ 7. Start the jack daemon
/>/ 	jackd -d alsa
/>/ 8. Start your jack enabled sound sources
/>/ 	hydrogen
/>/ 	rosegarden
/>/ 	timidity -B2,8 -iA -Oj
/>/ 
/>/ 9. Start a jack patch app
/>/ 	jack-patch-bay
/>/ 
/>/ or
/>/ 	qjackctl
/>/ 
/>/ 10. Ensure all jack apps have created their jack client ports.
/>/       Timidity requires a midi input to be connected before it
/>/  creates it's jack output port!
/>/ 
/>/ 11. Once you have all of your Jack apps running with output ports, start
/>/  audacity (portaudio-v19 enabled) Note: if you start it from the command line
/>/  you will see error messages regarding access to the alsa devices
/>/ 
/>/ 12. Open the preferences Audio I/O dialog.  You will now be able to select
/>/  the available jack clients as your recording source.
/>/ 
/>/ 	Note: if you start up more jack clients, they are not detected 
/>/	by audacity.
/>/  You must exit audacity and restart it to detect the new jack clients. :(
/>/  Furthermore, Audacity does not open a jack input port until you hit record
/>/  or play.  When it does it automatically connects them with the selected
/>/  input or output jack client. BUT it closes the ports when playback/record is
/>/  stopped.
/>/ 
/>/ 	MATT/VAUGHAN/DOMENIC: This is not how jack access should 
/>/  work. ports should not go away unless the client(eg audacity)
/>/  is shutdown. The idea is to create them, connect them, then
/>/  use them. this is may or may not be a portaudio problem.  I
/>/  have not looked into Audacity's use of PA and PA_JAck to
/>/  determine where the fault is but it is possible that it is
/>/  in EITHER audacity's use of PA or PA's use of Jack. We would
/>/  greatly appreciate it if you would take a look and see IF
/>/  your use of PA needs to be modified to ensure jack client
/>/  longevity.  I will inform the PA crowd of this as well so that
/>/  they can check their side of things, if I get a chance.
/>/ 
/>/ 	MARCOS: Hope this helps.
/>/ 
/>/ Hasta luego
/>/ 
/>/ Linton/



It works for me.


Hector.