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Old 12th June 2012, 09:46 PM   #1
IG81 is offline IG81  Canada
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Default Measuring loudspeaker impedance with HolmImpulse - possible?

Hi,

I use a Behringer UCA222 USB interface, which is supposed to be full duplex and has 2 channels, input and output sections.

I'd like to have HolmImpulse read the voltage at the input of the UCA222, which would be the voltage accross the 8ohm resistor in series with a driver. I'd export the voltage vs frequency data to a spreadsheet to convert to impedance vs frequqency, much like I do manually.

It did not work when I tried and I'm not certain why. One thing I'm not sure of is, where you choose the I/O devices, there is no distinction between the input or output "section" for "USB audio codec", much like how I can set the microphone for the ouput device (I don't know why this is allowed). So I am not even certain it even tried to read the UCA222's input.

Is this even feasible?

IG
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