OK, seriously, no joke here.
I have the O2/ODAC plugged-in to my Retina MacBook Pro, only Finder, Activity Monitor, Skype (text chat, no video chat), and Firefox with 1 tab (Head-fi) are open and I can hear the radio. Seriously this is really scaring me. I turned on the O2's gain switch to make sure I wasn't hearing things. It's playing the 106.9 radio station (I know the radio station pretty well). They just finished playing a Nickelback song and now they're playing Jason Mraz's "I'm Yours".
I am genuinely confused and scared at the same time. What in the heck is going on? D:
The radio music is louder when I put the ODAC on top of the O2. Retina MacBook Pro -> ODAC (via provided JDS Labs USB cable) -> O2 (via RCA connectors) -> any headphone I use -> my head and I hear the radio station
*this isn't the first time this has happened either; the first time it happened I just ignored it*
What the hay? If I unplug the O2's DC power source, I no longer hear the radio station.
And "popping" with the O2/ODAC might be due to the computer. I plugged the combo in to a Dell desktop computer at my school and had no "popping" issues. I get the "popping" sound when I plug in/out the combo when I use my Retina MacBook Pro though.