Edision Openvix Audio Stutter

Hello, I am having a problem with audio stutter on every type of channel (terrestrial Irish channels, satellite Astra channels, IPTV channels). The audio stutters badly quite a lot when changing channels and the only way to stop it is to change channel and come back again to fix it. Sometimes even that doesn't solve it and I have to go through several other channels before it settles. Does anyone know why this is happening and what I can do to fix it permanently? I'm guessing it's an audio setting but I don't have a clue which one. I have an Edision OS Mio with the latest Openvix flashed to it. Thanks in advance!