darrenyeats wrote: > I remember JA of Stereophile writing that a big problem is that we > measure what is easy to measure, rather than necessarily what's > important. > > I think measurements of sine waves (or two sine waves for IM distortion) > is a pretty limited measurement. It is what it is, a minimum test. The > behaviour of the device with a real music signal might vary > considerably. > > The old principle - one often quoted when it comes to business metrics - > "you get what you measure". If designers design to perform well with > these sine wave tests (whether because they trust them, or they are > fighting a spec war) then the design will perform well with said sine > waves. Further to that, how can we know more? > > I would very much like to see a new set of standardised tests which can > really represent a rich, complex signal in a meaningful way. > > Anyone got ideas? Archimago, this could be your chance. The "Archimago > Test" beckons!
Julf wrote: > That rich, complex signal will consist of a sum of sine waves. Yes Fourier was not wrong , every signal can be represted as a sum of sines . besides prioties : *1. Do away with sigthed testing , estblished some kind of controlled protocoll (ABX) .* (1b . You may not need extended bettter measurments if something fails an ABX .) 1C also ABX against a reasonable standard , obviusly coulored stuff is not hifi . 2. -Then- residual unresolved differences may need better measurment ( a couple of percent % for electronics ) Spekaers may be beyond a magazine to thoroughly measure ,according to Harman it takes 70 different measurments to fully characterise a speaker 8Sean Olive). 3. There is a very good test audiodiffmaker , you can compare a complete song how complex do you want :) choose whatever music you please . Difference test is really good , then you can actually adition the leftovers seprately . Then we have the stuff thats not meant to be transparent . it will fail all the tests but a diff measurment could shead some ligth how that components particular euphonics works . Maybe even publish files for curius readers to download . Some people want a certian tonality thats not neutral . But it would be more honest to admit what it is and not invoke magic or " the unknown " . It has been proven many time that there really is no unknown . TAS for example uses some kind of very contorded reasoning to avoid ABX so that they can live in thier illusions (I do suspect they know but like to keep thier readership in the cult ) -------------------------------------------------------------------- Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: Touch + powered Fostex PM0.4 Misc use: Radio (with battery) iPad1 with iPengHD & SqueezePad (in storage SB3, reciever ,controller ) server HP proliant micro server N36L with ClearOS Linux http://people.xiph.org/~xiphmont/demo/neil-young.html ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=101003 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
