In which direction are you having the problem (heard on the PSP or the phone). If it is heard on the PSP is it just noise on some frequencies, as that is expected as we have not cleaned that up yet due to the processing power that it was taking was meaning that calls would not work.
Testing from landline and cellphone to PSP using
FWD for VoIP:
On the PSP side I do hear some noises, the voice is scratchy but understandable.
On the Phone side the voices sometimes are a muffled.