[Xastir] Soundmodem on OSX

[Dana Rawding]

As subsequent posts have provided urls for Jack and JackonOSX I will  
not rehash.  But for those who have not looked it up:

"JACK is system for handling real-time, low latency audio (and MIDI).  
It runs on GNU/Linux, Solaris, FreeBSD, OS X and Windows (and can be  
ported to other POSIX-conformant platforms). It can connect a number  
of different applications to an audio device, as well as allowing them  
to share audio between themselves. Its clients can run in their own  
processes (ie. as normal applications), or can they can run within the  
JACK server (ie. as a "plugin"). JACK also has support for  
distributing audio processing across a network, both fast & reliable  
LANs as well as slower, less reliable WANs."

Again I'm not suggesting that it's the be all end all but if there was  
a middleware packet decoder that could connect to a Jack stream on one  
end and Xastir on the other I think that would be huge.  I'll bet a  
large amount of the decoding stuff could be lifted from the current  
soundmodem code or maybe soundmodem itself could be modified to be  
able to get input from Jack.  Of course the cat's meow would be if  
Xastir could connect to the Jack stream and do the decoding  
internally.  Maybe some day when the more modular Xastir 2 finally  
arrives it could be a possibility.

Dana
N1OFZ


On Jun 21, 2009, at 10:24 AM, Keith Kaiser wrote:

> I don't know Jack!
>
> I guess I had to say that. I've never heard of whatever Jack is, can  
> you give us a little background or point us at a web site?
>
>
> On Jun 21, 2009, at 9:11 AM, Dana Rawding wrote:
>
>> To Curt's comment,
>>
>> There  in lies exactly the issue.  The one thing you can't do on OS  
>> X is recompile the kernel.  Therefore we will never see native AX. 
>> 25 on OS X.  However as Curt pointed out it could be possible to  
>> create some kind of KISS TNC emulator.  However I think that's  
>> going the wrong way.  It would be more advantageous and forward  
>> looking to add something like Jack support to Xastir.
>>
>> I currently run a Software Defined Radio on OS X with Jack and John  
>> Melton's Java GUI with no problem.  If down the road Xastir was  
>> able to get sound input/output from Jack it would be completely  
>> possible to do all sorts of soundmodem stuff with OS X or for that  
>> matter pretty much any platform.  As SDR's get more popular and  
>> common in the future I think our wonderful developers will add Jack  
>> support.  All it takes is one or two of them to get interested in  
>> the project and I bet we would see code in a matter of days ;-)
>>
>> Dana
>> N1OFZ
>>
>>
>> On Jun 20, 2009, at 5:00 PM, Curt, WE7U wrote:
>>
>>> On Sat, 20 Jun 2009, Keith Kaiser wrote:
>>>
>>>> Thanks for the explanation Jason, I won't say its all clear now  
>>>> but I do understand better.
>>>>
>>>> So now all we have to do is find some software genius that can  
>>>> create a soundmodem equivalent for us.
>>>>
>>>> Yea, that'll happen!
>>>
>>> If it runs on FreeBSD and Solaris, it can be made to run on OSX.
>>> I've run it on Linux with both methods, AX.25 network interface -or-
>>> serial KISS TNC.  It works fine either way.  You'd be shooting for
>>> the KISS TNC emulation 'cuz it doesn't need AX.25 protocol added to
>>> the kernel.  All user-mode stuff.
>>>
>>> -- 
>>> Curt, WE7U.				archer at eskimo dot com
>>> http://www.eskimo.com/~archer
>>> Lotto:  A tax on people who are bad at math. - unknown
>>> Windows:  Microsoft's tax on computer illiterates. - WE7U.
>>> The world DOES revolve around me:  I picked the coordinate system!"
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>
> 73's
> Keith Kaiser
> wa0tjt at gmail.com
>
>
>
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