If you have discomfort listening to multi-channel audio where each speaker in a separate channel (e.g., Agent heard in the right headphones and Customer in the right one), you are not alone, and we have an answer for you:)

The easiest way is to set up Operating System to output audio that way.

Windows

Please follow this link and jump to the "Hear all sounds in one channel" section to set this up.

macOS

Please follow this link and jump to the "Play stereo audio as mono" section to set this up.