Regarding the FIRST type (conducted over Skype, the person who proposes the topic joins, along with an expert or two):

The audio gets a little variable on these, as I can't necessarily control the audio environment my guests are in. You'll find them getting better and better through the first 6 episodes, but the audio will always be a catch-as-catch-can.

Regarding the SECOND type (round table, still using topics the audience suggests): *

The audio is usually "cleaner" on these since my guests are local and I can control the audio environment.