[amsat-bb] Jack Audio w/FoxTelem

[Roy Dean]

Paul,

Thanks for the advice.   This seems to be working a little bit better, but
I still have no clue how to define the inputs and the outputs via
pavucontrol.   Everything I do that results in audio actually getting to
FoxTelem turns out to be through the laptops internal microphone.   I can
verify this by clapping and seeing the display in FoxTelem change.   What
are the settings in pavucontrol that needed to be made?   Currently I have
the following:

Playback:
GQRX (audio output on)
Java  (audio stream on)

Recording:
ALSA plug-in [java]:  ALSA Capture from [built-in blah blah blah] (whole
bunch of options here, including the sink/source)

Output Devices:
Built In Audio Analog Stereo (port speakers)
Uplink Sink loop_sink on Built-in Audio Analog Stereo

Input Devices:
Internal Microphone
Virtual Source loop_source on Built-in Audio Analog Stereo

Configuration:
Profile Analog Stereo Duplex (whole bunch of options here)


Thanks in advance....

--Roy
K3RLD



On Sun, Nov 12, 2017 at 12:59 PM, Paul Stoetzer <n8hm at arrl.net> wrote:

> You don't need Jack. You can just use PulseAudio with it's virtual
> sink and virtual source.
>
> The following command should work:
>
> pacmd load-module module-virtual-source source_name=loop_source
> uplink_sink=loop_sink
>
> Then you can use pavucontrol to send the audio to loop_sink from Gqrx
> and use loop_source in FoxTelem.
>
> 73,
>
> Paul, N8HM
>
>
>
>
> On Sun, Nov 12, 2017 at 12:47 PM, Roy Dean <royldean at gmail.com> wrote:
> > I know I'm beating a dead horse, but has anybody here had recent success
> > using jack audio (ubuntu/linux) with FoxTelem?
> >
> > I'm trying to pipe audio into FoxTelem with Jack, and I'm simply not
> doing
> > something correctly.   First and most importantly, whatever I am using to
> > generate audio (GQRX or rtl_fm from a terminal prompt) completely freezes
> > as soon as I start the jack server (before I even "connect" the input and
> > output), but resumes as soon as I stop the jack server.   Not sure if
> this
> > will ever work if jack stalls the software generating the audio.
> >
> > Hoping to get something up and running by the Fox launch, but now I am
> > reminded as to why I gave up on this a few months ago.
> >
> > Any tips before I throw in the towel (again)?
> >
> > --Roy
> > K3RLD
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