[Xastir] Soundmodem

[Jarett DeAngelis]

That would be useful code, if it works.  Have you considered sending your
changes back up to the project for incorporation?

On May 7, 2011 9:57 PM, "Andrew Errington" <a.errington at lancaster.ac.uk>
wrote:
>
> On Sun, 08 May 2011 10:24:06 Jarett DeAngelis wrote:
> > Curious -- what's the use case here?  Are you running on 2m and 70cm?
>
> Um, no.  Nothing so exciting.  I am just testing.  I am modifying
soundmodem
> to include PTT control via GPIO on the USB sound chip (I talked about this
on
> this list recently).  I need to test soundmodem to make sure I didn't
break
> anything.  I only have one radio, and I don't know enough people in this
area
> who would volunteer to be the 'other end' yet.
>
> For testing, I wanted to be able to send on one modem and receive on the
> other.  Since I have only one radio I'm not actually using any radios.
> modem0 has a speaker attached to the soundcard output, and modem1 has a
> microphone attached to soundcard input.  I could wire them together, but I
> wanted the illusion of over-the-air comms. :)
>
> soundmodem will work in duplex mode, so it can send and receive at the
same
> time.  It seems that it doesn't matter that Xastir sends my test message
to
> both modems, since I can receive the test message from modem0 on modem1
even
> while modem1 is transmitting.  I suppose I could run two X sessions and
run
> Xastir on each one.  I could send a message from one instance and receive
it
> on the other.
>
> Since it works I can now take my PC (laptop), two USB soundcards, one
radio
> and one microphone to the local hams and demonstrate.  I can show APRS
> messaging by holding the mic. next to someone else's radio, which means I
> don't run any risk of damaging their hardware.  APRS is not really popular
> here, which means it might be completely new to some people.
>
> 73,
>
> A
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