So I've been asked about duets and how to work on them, well I think it's a very simple answer to your question
when singing and you want to do pairing and you don't live near someone that you really want to do a duet with message them and ask if they want to do a duet first
if they agree then record yourself then either post it on youtube, niconico, or mediafire (or anyother download place that you like)
if you really good at editing songs and (if your not i can help with that :D ) then edit the song to sound like a duet or any other thing.
so if you have any questions please contact me at