I mentioned this incidentally in another post and it seems at least one other agrees with me .... I rarely find the search facility on this forum to be very useful, mainly because it rejects a lot of terms as "too short" or whatever. So terms like "USB" or "DAC" or "CD" or "LP" for example get ignored. I don't know if anything can be done about this. A better search facility would minimise the tendency for the same questions to get asked over and over again...