[doveman2]

Is there anyway perhaps to make LiveTV (and playing back .ts recordings) use OMX and the analog output, whilst the rest defaults to MMAL and the DAC+?

That would at least enable my brother to use LiveTV with the lower quality analog output, until such time as MMAL can be made to work with LiveTV/.ts files and benefit from the higher quality audio from the DAC+ when watching movies/listening to music.