What do you mean by 'unrecognisable'? The pronunciation of this sentence sounds perfect to me. I know most of the speakers who recorded audio have different accents, but none of them are unintelligible.
My comment is not a crticism, but what I mean is that I have lived a long time among native Gaelic speakers and sung in senior Gaelic choirs and despite that I sometimes do not grasp what is being said due to clear differences in pronounciation!!