Measuring hardware eq with FS.

[lalalandsynth]

Is this possible somehow , Something equivalent to the Impulse and transfer function but for outboard ?

[martinvicanek]

Yup, that's possible. The idea is to feed the device with white noise and analyze the spectrum at the device's output. We may both generate white noise and analyze an audio signal within one schematic. Here is how:

1. Create a schematic with white noise connected to the output. Connect the input to a spectrum analyser. (Well, I've already done that so I'll share the fsm below.)
2. Physically connect the output of your audio interface to the input of the hardware device that you want to measure.
3. Physically connect the output of the hardware device to the input of your audio interface.

There you go! You might find the readings soewhat noisy. There are two things you can do about that:
(i) average over many spectra
(ii) reduce the frequency resolution
That's what the two knobs on the analyzer are for.

Have fun!