yeah so for my android brainiac setup i picked up
https://www.amazon.ca/gp/product/B08...?ie=UTF8&psc=1
which will allow 2 channel optical out from the android tablet to the optical input on the JL vxi amp i'm using. Could probably do the same for the ipad i suppose. the vxi amps have a port for connecting a volume knob which i'm going to do. That kind of thing would still work nicely with this setup.
how does the pioneer recognize the ipad as far as a usb device is concerned? is it mounted as external storage? so the music is actually playing on the pioneer?
or it acts as a controller and sound passthrough for the ipad?