Have I subscribed to the wrong list? I originally thought this was a help type list, but it appears to be more of a developer's forum. I was looking for a forum where I could get a better understanding of the overall linux audio system; ie ALSA, Jack Audio, pulse audio and hardware and how they all interact. The individual .net or .org sites for each of these separate entities are detailed about their own projects but seem somewhat vague about how they all tie together. I thought I understood them and had a box running Mint 16 ALSA JACK & PULSE and when I set up the jack patch system and understood what was a dedicated connection; feeding a 1004 Hz tone into the line in on the hardware seemed to be fed everywhere and same with a mic which caused feedback loop and loud squeal. From what I read once everything showed up in the jack connections panel, jack had control and this strange feedback should not have occurred. So if I am posting to wrong list I apologize and would appreciate a link to a more appropriate list Thanks