I've recently swapped my old Amlogic MX2 (Meson 6 based) box for a Rockchip RK3399 based box and I've noticed a significant loss in HDMI audio output quality. The box is connected to a SONY HDTV and the output is set to HDMI audio with 2.0 channels. Digital passthrough is disabled. I'm using the official RK3399 image (8.90.015) with Linux 4.4 and RKMPP framework.
I can't say the sound is not working, it plays almost fine and some people probably wouldn't recognize anything is wrong, but since I've got a decent 2.0 audio system connected to the TV I can definitely say the audio clarity is much worse than it is with the old Amlogic box. It is almost like the output sample rate is limited or resample quality is set to low. Sometimes I can also hear a tiny cracking like when you play a vinyl record
Anyone experiencing similar behaviour on a Rockchip device?
Kwiboo Can you confirm such behaviour? Could this be a hardware limitation or is it going to improve with the mainline support?