Pass Digital audio over from android tablet to MAC

I use two digital synths on my android tablet. I like their MPE keyboard-on-screen. I need to record them on my DAW.

I want to send digital audio signal out of the tablet and into my mac, avoiding unnecessary AD/DA conversion is the priority.

Is it possible to do it by tinkering with the android settings or do I need to buy a usb to SPDIF adapter or something?