I know recording with an on-board p/up is very nearly always not the way to go! I record my acoustic guitar in a variety of ways, I also record my vocals & guitar "live" all in one go and nearly always with condenser mic's apart from sometimes using my favourite vocal mic. an old Beyer M300 dynamic, I do mainly blues and jazz type material adding bass, acoustic lead guitar and harmonica tracks later, this all I can do, no problem! But! occasionally when the house is not a quiet place, visitors, road works, barking dogs and mainly when working on new ideas I use the Beyer or a Shure 57 and the on-board Highlander P/up, the condensers pick up too much back-ground, how can I reduce the "quack" and get an half decent guitar sound ?