Re: jackd - no sound

On 28/07/14 23:08, Patrick Shirkey wrote:
> On Mon, July 28, 2014 10:55 pm, David wrote:
>> I'm hoping some sound guru can notice something really silly and simple
>> that I've done wrong.
>>
>> Ubuntu 12.04
>> jackd
>> yoshimi (synth software)
>> a midi controller
>>
>> In the audio panel, yoshimi is connected to "system"
>> In the alsa panel, the midi controller is connected to yoshimi
>>
>> When I press a key, the level shows on the synth software display, but
>> no noise comes out of the Logitech headset. Sound is NOT on mute. The
>> headset IS selected in the sound panel. Sound IS working on all other
>> programs (audacity, firefox, rythmbox etc). There are no speakers on the
>> system.
>>
>> I've tried Qsynth and a virtual keyboard too, but the same problem.
>>
>> After fiddling with various settings, qjackctl routinely locks up and
>> has to be manually killed. I'm not sure if this is related.
>>
>> I get a lot of errors in the message panel thus:
>> jackd audiodriver::ProcessGraphasyncmster: process error
>> but I can't find a google reference that relates to the problem I'm
>> having.
>>
>>
>> Everything used to work but I haven't used this set up for a few months.
>> Could it have anything to do with Pulseaudio?
>>
> You probably need to disable PA or use the jack plug/sink
>
> Check you have installed  pa-jack-sink
>
> Or you can disable PA with the following commands:
>
>   echo autospawn = no >> ~/.pulse/client.conf
>   pulseaudio -k
>
> - To run PA again type:
>
> pulseaudio -D

Thanks for that.... I now have a working yoshimi/midi-controller after 
disabling pulseaudio

I installed pulseaudio-module-jack (which contains pa-jack-sink) but 
couldn't figure out how to configure so that pulseaudio was working 
nicely with jack.

Unfortunately, this means I can't use any other sound program at the 
same time as the midi controller (eg: audacity?)



For the record, these are my notes of what I did:

<notes>
# first kill pulseaudio:
$ echo autospawn = no >> ~/.pulse/client.conf && pulseaudio -k
$ qjackctl &
   qjacktrl -> setup ->
         input device,choose midicontroller from dropdown
         output device, choose headset or speakers from dropdown
   restart jackd
$ yoshimi -a &
   choose instrument (click on blank field next to "edit" button)

   qjackctl -> connect -> Audio
         connect yoshimi output to system input
   qjackctl -> connect -> Alsa
         connect midicontroller output to yoshimi input

EVERTHING SHOULD NOW WORK

# after quitting everything restart pulseaudio:
   yoshimi -> quit
   qjackctl -> quit
$ pulseaudio -D
$ rm ~/.pulse/client.conf  #  ?? not sure whether this is necessary??

at this point there is no sound services available apart from jack 
connections
pulseaudio-module-jack should fix it but it didn't - more research needed
</notes>
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