One visitor to the festival Max Hall, a record producer, said that he still used a Commodore 64 in recordings: "A lot of the sounds are really useable so it's fantastic, I think it's reminiscing back to my childhood".
Mr Griffiths was enthusiastic: "It's fantastic, we came up to the summit and seeing the building really lifts you - but I'm disappointed it's not open for a bacon sandwich, " he said.