The K3S has a built in sound card... via the USB connection. You can download the manual for the K3S here and read about the USB interface and sound card: http://www.elecraft.com/manual/K3S%20Owner's%20man%20A1.pdf
Here is the review from the ARRL: https://www.youtube.com/watch? v=wMy3f52sSvo If the Elecraft user manual isn't enough and you are close to pulling the trigger on a K3S, you might want to spend $45 on "The Elecraft K3S & P3" by Fred Cady" (on the order page) Well worth the investment. At the end of the day, you don't need an external sound card, but you can use one if you want to... then pair it up with the software of your choice, fldigi, dxlab, mmtty, etc... etc... Google, google, google... the sky is the limit on the information you will find. YouTube etc... Max NG7M On Tue, Nov 29, 2016 at 8:25 PM, Bill DeVore <[email protected]> wrote: > I'm new to Elecraft and was wondering how most of you handle digital > communications. > > Use the K3 Utility program for digital modes or something like SignalLink > USB with fldigi or equivalent? > > Bill - W3PNM > ______________________________________________________________ > 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] > -- M. George ______________________________________________________________ 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]

