Is it possible to use rotary encoder, potentiometer, push buttons connected to GPIO pins to change low pass frequency or to cycle trough multiple EQ presets?
I would like to use amp v.4 to power a subwoofer and to be able to change sub frequency with rot. Encoder just like on sub amp. (Existing up2stream Sub Amp does not have inputs or ADC keys. )
ACP workbench documentation is missing this details…
Any smart idea is welcome 
@zpl1025 Happy Year of the Tiger Frank 
Thanks, 
Happy new year of tiger.
did you ever resolve this? i have a couple stand alone powered speakers that i would like to join into the arylic system and would like to use the mini with a low pass filter similar to the sub amp. i dont care about having a dial as i wouldn’t be changing it once i find the right cutoff. does the workbench give a low pass capability to these devices through programming?
yes, in acpworkbench you can do it.
What I was trying to do is
use rotary encoder, potentiometer, push buttons connected to GPIO pins to change low pass frequency like it is on sub amp, but I did not resolve it. @zpl1025 did not provide answer 
I had to use external DSP that is programable to do anything