Hi Gary. I don't want to hijack this thread from the other gentleman, but are you saying that you must have the resister and capacitor in line in order for this to provide decode-able discriminator audio? I've poured over these threads and I didn't see that it was an absolute necessity, but there is so much info now I may have missed it. I begin to wonder if such a setup is an absolute necessity as I seem to have done everything else right with regard to audio levels, using a second sound card for output, etc., but I rarely hear anything intelligible, just lots of garble despite plenty of scrolling information on screen. I have tried this now with 3 different computers, three different discriminator outputs from an AOR AR5000A+3, Icom IC-PCR1000, and a Uniden BC246T. I adjust the level for between 40%-50% input. Just can't quite get there. Another issue I have here is that I only have conventional P25 stations in the area from a military base which makes it harder to test.if your tap isnt configured similar to what I have described you probably wont get anything usefull from the scanner to the computer. For level setting you can also open the sound setting on your computer and adjust the line or mic in.