I'm trying to do some RTA analysis to set up an audio system, and am using a Lyngdorf measurement mic with a t.bone USB interface. However I'm getting some problems which I suspect are due to the mic. I'd be very grateful if anyone could loan me a USB measurement mic or a standard measurement mic with a USB interface so that I can isolate the source of the problem. I'm of course happy to pay a deposit and cover postage costs.