cliveb;421576 Wrote: > The 89 (or 83) dB value is misleading you into associating it somehow > with the 96dB dynamic range of 16bit PCM. The two figures are completely > unrelated. > > The Replaygain algorithm compares the loudness of the track/album in > question against the loudness of a -20dB RMS pink noise signal, and > simply sets an adjustment to bring down (or up) to the selected target > level. > > The fact that the target level was originally expressed as "83dB" (now > usually 89dB) is down to the fact that the SMPTE standard states that > pink noise at -20dB RMS shall be played back at 83dB SPL. (If you want > to you could play it back at 110dB SPL - it's just a consequence of > where you set the playback volume control). > > As I understand it, Replaygain chose the -20dB RMS pink noise signal as > its "base reference level" for no other reason than it was a convenient > standard that happened to be in existence. The fact that they also > decided to use the SPL playback level as the way to express the target > loudness seems strange to me, because it's clearly the source of > confusion. (But then again, the guy who developed Replaygain has a > doctorate in this area, so he probably knows what he's doing).
Thanks Clive - that's cleared that up for me! I'll have the results of the tests you suggested later today... looking interesting! -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB3 (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Outdoors: Boom ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=57872 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
