Just started using my SDRs again. I have 2 Nooelec NESDR Mini 2 R820T2's. I used SDRconsole to change the serial number on one of them so I would be able to tell them apart. I figured out that the PPM needed to be set to 65 for the freq offset. I have the JMBE Audio Library configured/compiled. The one tuner locks onto the CC and will show that there are active transmissions. Very occasionally I will get some audio but mostly not. I've tried other systems (VA STARS) and it acts the same way. Any suggestions?