Voice Issue on my glide

[chief_fm]

Hi... I installed the following rom on my glide (cm-10.1-20130217-UNOFFICIAL-i927) and everything is working fine but i have one issue; when I make a call through voice over IP softwares such as (Viber, Skype, Tango... etc) the voice is very strange, thick and slow... please help if anyone have a solution for this
btw thought its from the internet connection but I tried many internet sources from many ISPs... same issue, so the problem is not from the internet quality...its from the rom

 

[Muhammad Fahad Sadiq]

i have same issues. samsung s glide with updated software to JB. now skype viber sound has issues. it is heavier and slower. what can i do to change it?