The Problem
The Behringer Q802USB mixer doesn’t send audio to the headphone output in both directions (in and out) when using the USB to interface with your computer. In other words, you can’t hear yourself and the audio from the computer (e.g. Skype) at the same time when using the USB connection.
When I did my initial overview video of the Q802USB I didn’t find this quirk. Mostly because I had never seen it before nor did I know that there were mixers that could not do what seemed like an obvious task. [Read more…] about What’s Wrong With the Behringer Q802USB and How to Fix It.
and place the other end into an available channel on your mixer and now you can take audio from the phone into your recordings. But what if you want to also send all the audio from the mixer (your mic, your co-host, sound FX, etc.) back to the person on the phone without them hearing themselves? That’s called a mix-minus and you can use a couple different devices to achieve this setup. 
A podcast sponsorship can be a hard deal to negotiate and for many smaller shows it’s not likely worth the tradeoff; having to put ads in your content for a small monetary return. But what if the exchange was not money but instead something likely more important to a podcast… new listeners.