My thoughts. Only closely miced apply ultrasound is rapidly damped in air.
The 20kHz is welll established due to the mechanical "design" of our ear , exceptions is extremely rare . HF hearing starts to detoriate when we are kids and dont get better. And the extrme ends of our range 20 and 20khz are realy only audible at really loud levels so loud that you wont hear 20kHz sittings in the concert hall even if an acoustic instrument outputs this . And probably uncomfortable levels at your home me stereo. Mass market migth not want tp pay for 24/48 original masters instead you can buy them upsanpled to 24/192 at hd tracks ;) I think Julft is rigth here at best most of music has a 24/48 original. Bith depth today we know how dither works so >100 dB with 16 bits is possible and just random noise and no nasty classic sample noise. If you do test your hf hearing at home there are some caveats. Bad anti aliasing and intermodulation , my computer soundcard is not very good or the pulse audio sound system is not enterily rigth , so i cant do the test on my computer. Beware of you amps and speakers to ! They behave weird with high hf levels. And for voodoo dacs like NOS without proper filters they put out quite audible levels of junk when feed close to fs signals. So when out confused audiophile friends hear a difference it can be true ;) but again not for a good reason . Somehow diffrent is always better ?? Supose this can also be true for some exotic folter sulotions that deviate from standard practice. -------------------------------------------------------------------- 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 (spares Touch, 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=106621 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
