Edit/addendum to my last post, Greg: I realised I had an iPad with 3.5mm input in my armoury that can run HouseCurve with the iMM-6 plugged in directly and just WOW, it's a super nice app. Plain to see how much care and thought has gone into it and needless to say, perfect for my needs of measuring tweeter, woofer and combined units! Thanks heaps.