Edit- Wrote this whole damn post then noticed the subreddit I’m in! Ignore this post if you like. Might leave it here just in case someone is curious.
Good posts already but just wanna point out they can mean different things in different contexts.
If you’re an electrical engineer designing some kind of audio hardware, gain is a description of what the particular circuit/circuit fragment you’re talking about does to the signal it is passing, amplitude-wise.
Does the input buffer lose a little bit of high end but otherwise the amplitude is untouched? The gain of the imput buffer is probably 0.95 or something
Is there a fixed gain stage to bring the signal back up a bit after a the losses in a filtering section? It might be designed to have gain of 1.2
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