Default [Q] Low speaker sound on MIUI V5 & Lewa OS 5 on A116

Hello everbody,
the sound volume on speaker in A116's stock rom 4.2 is loud but on MIUI v5 and lewa os 5.1, it is very low. Can we port some audio libs from stock rom to MIUI/Lewa for loud sound? Or is there any other workaround?