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Audio Hardware / Re: Continuously monitor Power Amp Input or Output to see if it is maxing out
Last post by fooball -Typically, power amps with built-in clipping detectors (they light a LED just before the onset of clipping) compare the output to the speakers with a proportion of the output stage's voltage rails, because the main cause of clipping is when the amp runs out of voltage headroom. The clipping circuit only cuts in when there is an imminent problem, so distortion hardly matters at that point.
It's not an easy thing to do as an add-on, you can get signal level meters sure, but how do you then calibrate what full scale should be?