The only defacto standard that exists is imho the "FLAGS PRE" info that can be part of a CUEsheet. EAC detects and adds it a while now. I guess foobar can add de-emphasis on the fly with a plugin on playback. XLD for example couldn't detect it a while and implemented it pretty late. itunes applies an EQ for de-emphasis while ripping. Last time i checked it was more then 1dB off. The filter itself can be created with several EQs that have the correct behaviour. There are also convolver presets for foobar. Waves "Q" equalizers did this many years back already also with the abbility for pre-emphasis for mastering. The most accurate implementation may be the biquad used in SoX and its deemph option. The values for the filter are gain=-9.477, frequency=5283 kHz and slope=0.4845 As biquad highshelf this should be for SoX: sox i o treble -9.477 5283 0.4845 I collected several pre-emphasised testtones created by different sources and all are more or less different. I use a slight different curve therefore to have a slight dipp in the critical area. Better -0.1dB to less as +0.1dB to much @4kHz
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=103078 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
