So the Quad ADSR module can generate audio range signal as a pseudo
LFO with the end of decay out patched to the ADSR's own gate input.
What are the drawbacks to using it as an audio/LFO source I know that
the signal is always above 0 volts because it's an ADSR, right ... do
I need to use a polarizing mixer in order to get it into more of an
LFO state by bringing it into negative voltage or am I thinking of it
in the wrong way

...and this may or may not be related here, but I've come across AC
coupling vs. DC coupling in the archives and am wondering what this
means exactly for synthesizer CV and audio signals.

thanks in advance for pointing me in the right direction!