Hi guys,
Stupid question...
I have no scope. I want to be able to view (and adjust) harmonics in my Pass BA-3 preamp. I have a USB audio interface (I use it for recording to my mac) and with some free software like this:
iSpectrum - Mac Audio Spectrum Analyzer
Would I be able to view harmonics? It would just be a line-level signal, nothing high voltage. Is this feasible?
Stupid question...
I have no scope. I want to be able to view (and adjust) harmonics in my Pass BA-3 preamp. I have a USB audio interface (I use it for recording to my mac) and with some free software like this:
iSpectrum - Mac Audio Spectrum Analyzer
Would I be able to view harmonics? It would just be a line-level signal, nothing high voltage. Is this feasible?
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I can't see any reason why not. You would however need a very low distortion source which does not produce harmonics. Otherwise the harmonics of the source might swamp that induced by the preamp.
The high frequency limit of most professional audio interfaces goes up about 96 kHz (192 KHz sampling) , so you will get fairly good reproduction of waves up to about 20 KHz.
The sensitivity of these interfaces varies depending on what kind of inputs they have. A mic input gives you a fairly good range of sensitivities from a few millivolts up to several volts. If you want to look at signal voltages greater than that, you'll need some kind if external attenuator. You will not be able to look at DC levels, just AC signals.
There is a raft of analytical software for both PC and Mac, much freeware.
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