Hi All! I just receive my Zoom R8, bought it used from Reverb, and was hoping to use it to demo out some song ideas. I am running into a couple audio-playback issues. First, there is no audio playback from the console itself (while in fact the LED screen shows audio coming through my guitar in input one). Second, after trying with headphones, I am getting playback, but it is extremely muddy, distorted, and it is only on the right side. I've been scowering the web for ways to troubleshoot this, and have not found any yet. Hoping I didn't just dump $200 down the drain! Thanks in advance!!