Welcome – The lockups are recient and a fix is available and due to be broadcast (perhaps Wednesday) – (Barry any news?) – can be downloaded now from Humax beta site.
The sound problem – we need to know more – do you use an amp? The channels that do not have sound are possibly HD ones using 5.1 audio – there is a setup option to downmix it (can’t remember exact description) – the takes “ages to come through” really ages?
Could understand the need to wait for the start of a compressed block but I would think thats seconds.