help setting gpio with rotary encoders

[Bedlore]

Hey all, not wanting to high-jack the thread so let me know if I should start a new one.

I'm wanting to actually retro-fit an motor encoder into my analogue amp.  I don't want to use the software volume as it effects the quality but I would love to use the mood interface to control the volume of my amp pot.

Is this possible using the setup you describe here or is it only for reading from a rotary encoder?