I got my new Flex 6300 on Wed and I have been trying after work since then to get it to play with HRD DM780. Just today I got DDUTIL 3.0 loaded and can run HRD DM780 without rig control front end. I tried youtube recommended soundcard settings for sample rate adjustment. I have set DAX receiver gain to full scale "0" and copy about 75% of PSK conversations. I am running windows 7 professional. I am so aggravated and frustrated with DAX and audio settings I am ready to throw this 6300 in the yard. I have been running the Flex 3000 on the same computer with powersdr with no issues with HRD and DM780. Do I need to run the 6300 on a completely separate machine? I did not anticipate this kind of aggravation or I would have never upgraded.