i decided to go with the m-audio fast track pro. i will be using it for other things as well, but for this project (analyzing a car or a room audio system) it will work well with a behringer mic. I read the bit about calibrating a pc - TRUE RTA for dummies (
http://www.avsforum.com/avs-vb/showt...=572477&page=6) but am a little confused because of the multitude of in/outputs on the fast track pro. there are 2 balanced inputs for 2 microphones. these inputs are actually combo jacks that accomodate either an xlr(for a mic) or a TS(for a guitar or keyboard)
i assume to calibrate this device, i would need to go from the balanced trs outputs to the balanced mic inputs, yes? this would require male TRS-> male XLR
Or should i go this way: rca output -> TS male mic connection?
or should i go from headphone jack->splitter-> 2 TS male mic connections
what about the voltages-if i use the headphone vs balanced out(TRS) vs unbalanced out(rca) and pipe that into the microphone input---wont i blow the mic input? after all the real microphone usually does not supply voltage and phantom power is coming out of the microphone jack. In setting up a calibration loop, we are piping voltage into the microphone circuit.