Prueba de usar dolby digital y no viper. Un usuario de xda pone esto:
I dont use Viper, I only use Dolby digital mod, ICE Sound profiles and some Sony tweaks.
The rest is code related (everything is attached to te post.)
The sound is very clear and high when using the speaker, on the other hand, sometimes (very rare) I hear some crispy sounds when using headphones (but it guess it's because they suck)
Don't forget to give permissions to ICE Sound through settings > apps ...other wise it might not work.
Enviado desde mi HUAWEI RIO-L01 mediante Tapatalk