Dave Rowe is doing some exciting work with digital voice, all open source specifications and code. It isn’t appropriate for rig firmware yet, because he keeps improving it!
You can run FreeDV on a computer or get the outboard SM1000 box ($195). That does the coding and has an audio bypass mode so you can leave it in-line. http://www.rowetel.com/blog/?page_id=3902 <http://www.rowetel.com/blog/?page_id=3902> https://freedv.org/tiki-index.php <https://freedv.org/tiki-index.php> wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On May 4, 2016, at 7:55 AM, Bill Frantz <[email protected]> wrote: > > The real problem is which codec and transmission protocol do you use. Icom > has D-Star, and Yaesu, instead of supporting D-Star which might have improved > digital voice uptake due to larger critical mass, decided to push out its own > protocol. (I think they were listening to their commercial division which > wants to lock customers into using only their gear. IMHO, that's not ham > radio.) > > Note that with D-Star, the only proprietary part of the protocol is the > codec. If you use the chip which supports the codec, you are covered on the > intellectual property issues. For me, the supreme irony is that both Icom and > Yaesu use the same chip, but can't talk to each other. > > The other issue is that under weak signal conditions, FM is likely to be > better for getting the message through than either of these digital voice > protocols. > > There is a open source protocol which is used on HF, but I don't see much > activity using it. > > As far as Elecraft is concerned, there just isn't usage to justify the > engineering time. We didn't see PSK63 support until after the Europeans were > running PSK63 contests. > > 73 Bill AE6JV > > On 5/4/16 at 8:05 PM, [email protected] (Michael Heit via Elecraft) > wrote: > >> I have to wonder if a firmware upgrade in the future may allow digital voice >> from the KX3? > > ----------------------------------------------------------------------- > Bill Frantz | Concurrency is hard. 12 out | Periwinkle > (408)356-8506 | 10 programmers get it wrong. | 16345 Englewood Ave > www.pwpconsult.com | - Jeff Frantz | Los Gatos, CA 95032 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
