For the record I understand Fourier quite well: I've been designing digital filters for many years. The ultimate customers of products I've designed include all the major broadcasting companies in the world.
I said that music is made up of many discrete frequencies which occur at the same time, which is perfectly consistent with Fourier. Most audio equipment is measured by applying a frequency sweep to the input, and the plotting the output response. This is not quite the same as a typical RC measuring technique, which often involves feeding the -system- with an impulse and measuring the response, and then using a fourier transform to derive the frequency response. The reason it's not quite the same, is that with one technique, you are applying a discrete frequency at any instant in time, whereas with the other, you apply a range of frequencies simultaneously. Because the measurement techniques are different, it's perfectly possible to come up with different results for seemingly the same parameter. This is a common feature of measurement: the technique influences the result, and unless you are careful to use a measurement technique that properly represents how the equipment is intended to be used, the measurement is probably meaningless. For those of you reading that have not come across Mr Opaqueice (whoever he may be), he is my SD forum Stalker. He has no serious interest in helping anyone here or contributing in a positive sense - he is here solely to save you from enjoying your music -because to him it all sounds the same-. I do make the SB+; I don't make the Transporter; both of which I recommended the OP check out - before spending lots of money on fancy PSUs or DACs (which incidentally Mr Opaqueice doesn't think make any difference anyway). The OP should also know, that Mr Opaqueice would think him completely delusional in his experience of difference mains leads and blocks! I'll conclude with a question to those who are really interested in music reproduction. How is it, that two pieces of equipment that both measure flat (as near as damnit), reproduce an musical impulse (say a drum sound) quite differently? Fourier says that an impulse contains a whole spectrum of frequencies, so if the frequency responses are really the same, then the drum should sound the same too ... but it doesn't. -- Patrick Dixon www.at-tunes.co.uk ------------------------------------------------------------------------ Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=40737 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
