1. Flash Plus 2
2. Stock Android 6.0 Marshmallow
3. MTK based smartphone with 24-bit advanced audio headphone DAC (AKM4375) utilizing AKM’s original architecture which has been specifically redesigned for bring out the fullest, high quality sounds + NXP9890 audio amplifier.
Please kindly visit this page for more details http://www.flash3c.com/flash-plus-2/hi-fi/
Thank you so much.
audio_policy.conf