Thanks. I never enabled the remove tap restriction and oh yes, i set my usb at default. Whilst i did tried the options to enable passthru and also 2.4ghz on fw 1.3, i still experiencing stuttering audio. But, i will try those options again on this firmware.Did you enable "Remove tap restriction" ? If so, try disabling it again. You should also try "Force 2.4Ghz" if that has no effect. Enabling "Passthrough" would rule out some things too if both of those don't work.