My custom board is imx6q sabresd board,now I have two audio sound cards.
One is hdmi sound card,and another is usb audio sound card.
I known android 4.4.2 system is support usb audio.
Now I can found two sound cards in system.
I want to assign USB Audio as primary sound device in android 4.4.2 system.But not ok.
What should I do? Please,Anyone can give me some advices?