I believe I may have found my dream device for loudspeaker measurements and testing. It’s the recently-announced (in January) FA-66 by Edirol. It’s firewire, has multiple channels, and can support full-duplex recording at 24bit/192kHz! That would provide FuzzMeasure with a resolution of 96kHz — well beyond any human’s hearing!
Buying one of these will eat up the rest of my proceeds from FuzzMeasure, and then some. Upon getting one, I should be able to add full support for multi-channel interfaces. The RCA jacks (which I’d use for impedance) are on inputs 5 and 6, which is currently not supported by my audio device handling code.
Doing some further impedance testing this past weekend, I’m not happy at all with the performance of my M-Audio MobilePre USB. I think I will have to sell that device off, and move on with my life. :)
You know, it’s really tough to manage this extra money I make from FuzzMeasure and invest it directly back into development. It’s so tempting to say, “Hey, I have an extra few hundred bucks — I should buy a PS2!” Instead, I get all excited about audio interfaces that I’m able to stretch FuzzMeasure’s feature set with. :)