What happens if you go to MENU, SET, Connectors, MOD Input, USB AF/IF Output, AF Output Level? them monitor the audio on Skype and move the level up or down.
I don't have a 9700 but same layout of 7610 I hope...
I work Remote since 2008, when the first windows smart phone came to market, a little experience there.
Thanks
Miguel
KC7IGT