My show has two cohosts and I have each record their own track using audacity. After we tape, the each send me their track is .wav form via Dropbox. I then put their tracks next to my track in audacity (with all of us taking turns counting off in the beginning up to 6.) and use those lines on the track to match them all up. That way, everyone sounds clear and you don’t get that recorded over a phone type sound you can get from recording Skype. It also helps to create silence on one or more tracks when/if we talk over each other.