Great setup! What kind of USB audio converter(blue box) used on KACY feed? Mind sharing with some technical info?
We generally use one of the two audio interfaces on feeds that LiveATC helps with:http://www.amazon.com/gp/product/B009NVS6KS/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
We also use the Griffin iMic - available from various sources.
One reason is that these cards have a proper Line In interface which presents the proper impedance to a scanner's audio output. The other reason is that these cards have tested out pretty well in audio quality tests.
The cheap $1USD audio interfaces that exist can be made to work - you just have to either very tightly control the scanner volume so as not to overdrive them or provide your own impedance matching network so as not to overdrive the mic level input of those cards.