Hey there, Greg.

Easily the most handy thing I've put on my Ubuntu linux system is the Pulse Audio Volume Control utility. It provides a GUI to easily control what audio device each app plays OUT to, as well as what audio device some other app records FROM. So, it's very straightforward to route the audio to suit any need you might have when you want to do something like send your SDR audio to an SSTV decoder or in this case, the FoxTelem app.

(Tip: you'll normally want to record from the "monitor" of your audio device... you'll see it on the drop-down)

(Tip #2: you won't see an app in the utility until it's actually playing or recording)

To install: sudo apt-get install pavucontrol

... and to run it: pavucontrol

Of course, I use it so much that once it's running, I right-click the icon to "Lock to Launcher" so that I can run it the next time with just a click.

Hope that helps!

-Scott, K4KDR

==========================

On Thu, Sep 7, 2017 at 1:11 AM, Greg D [email protected] wrote:

Hi Drew,

I really need to get FoxTelem to run properly on my system... My preference would be to directly feed the SDR output into the telemetry program input, but I can't figure out how to connect the dots. Recording a pass and then post-processing it is a bit of a pain (hence my opening statement).

The system is running Linux, and I have a generic RTL-SDR dongle. GQRX software talks to it perfectly. I can even control it from software such as gPredict for Doppler tracking, so I know all that stuff is working. But how to feed the audio into FoxTelem? I was hoping the SDR would be one of the "audio sources" to select (IP Port), but it doesn't show up there. I'm running FoxTelem 1.4.

Is this possible? The user guide seems to think so...

Greg KO6TH

Andrew Glasbrenner wrote:

...

With today's big X9.3 solar flare, AMSAT would like to collect as much telemetry as possible from AO-85 over the next 48 hours or so. If you

can,

...

please run FoxTelem (https://www.amsat.org/foxtelem-software-for-windows-mac-linux/) and

feed

...

the program unfiltered audio such as from a 9600 baud jack or an SDR receiver. This will allow us to identify any unusual effects onboard the satellite.

Thanks and 73,

Drew Glasbrenner, KO4MA

AMSAT VP Operations

Yes sir, but it works just slightly differently.

There are actually a couple of "virtual audio cable" software packages. The one I use can be downloaded from:

http://vbaudio.jcedeveloppement.com/Download_CABLE/VBCABLE_Driver_Pack43.zip

... and after install, in any piece of software you use you'll have some additional audio device options beyond just your "real" speaker output & mic input.

So, a common use would work like this: in an app that OUTPUTS audio (like your SDR software), you set the output audio device to be the "IN" virtual audio cable.

On some other piece of software that is looking to take in audio (SSTV, FoxTelem, etc.), you set the audio INPUT device to be the "OUT" port from the virtual audio cable.

It's harder to say than it is to do. If it helps, sketch it out on paper. The "virtual audio cable" is just the link between one program and another.

Using a mechanism like that works much better than using any of your actual sound devices since it's a closed pipe from one end to the other.

-Scott

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-----Original Message----- From: Red Willoughby Sent: Thursday, September 07, 2017 10:55 AM To: [email protected] Subject: Re: [amsat-bb] AO-85 and the solar flare

Scott, do you know of something similar to the PulseAudio Volume Control utility that will run under Windows?

This is awesome - thank you Scott and John!