If you right-click (under OS X
you can also ctrl-click) on the input/output level meters the
dialog box below is displayed.
There is a useful feature in this dialog called "Gain when bypassed". It allows you to set a gain that is only applied when Spectron is bypassed.
When Spectron is on, its processing can affect the overall or perceived level of the audio. This makes it very hard to compare "Spectron on" to "Spectron bypassed".
"Gain when bypassed" solves this problem. You can bypass Spectron and set this gain so that when you A/B Spectron on and off the apparent volume is the same.
Note that this does not work if you use the host app to bypass Spectron. In that case, Spectron doesn't know it's bypassed and can't apply the "gain when bypassed". This only applies when the Bypass button on the Spectron faceplate is pressed (or Ctrl+B is pressed).
This is the only processing that is
applied when Spectron is bypassed, and it is of course only applied when Spectron is bypassed.
