I would like to plug in an USBA to toslink audio adapter to the usb OTG host on the ULTRA. This would require a minimal driver to pipe the audio from hdmi to the usb port , and it would enable me to use my fiber optic link to my home theater.
A headphone jack would also work.
This is the device i would like to use. https://www.amazon.com/USB-Optical-Audio-Adapter/s?k=USB+to+Optical+Audio+Adapter