Don't worry to much about this paper. They proved that by 56% (slightly better as flipping a coin) on 45.000$ speakers with special treated silent room using SUB-standard filtering that lowpassed music can be discerned. The exact filters used with MatLab were not offered, leave alone the real music samples. It is known the filters are very steep and they used a rectangular dither method even the paper writers (Meridian) don't see as sufficient but use it for the test. Also i saw no clear description if the difference was found as really better sounding in any concrete way, only a difference. They used an ultra hard metal tweeter with their speakers that itself may cause IM in a way that may sound different lowpassed. No attempt was made to exclufde that. So it may just be the "Most comprehensive paper ever published about metal tweeter IM" It becomes even more funny when following their conclusion that it must be the way of the filter acting while they did not try anything to prove different filters sounding different. They more or less copied their Meridian marketing speech into the AES paper. A clever BUY-IN! Thats how i understand it after reading some discussions and snippets of the original paper i found online.
I don't know anything about the signals they talk about. There is also a long thread at Hydrogen with lots of info. Transporter (modded) -> RG142 -> Avantgarde Acoustic based 500VA monoblocks -> Sommer SPK240 -> self-made speakers ------------------------------------------------------------------------ Wombat's Profile: http://forums.slimdevices.com/member.php?userid=4113 View this thread: http://forums.slimdevices.com/showthread.php?t=102934 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
