Waldo Pepper;618534 Wrote: > A signal from a record player (and that's all they are) has to be > filtered through an RIAA response pre-amp to account for the output > voltage being down to the frequency picked off the record. This is the > biggest source of non linearity as no analogue filter can ever 100% > represent the inverse of the magnetic cartridge due to manufacturing > variations. An often overlooked fact as few understand what L.di/dt > means. Rate of change of signal is lower at lower frequencies and has > to be compensated for by an analogue filter. Michael Faraday worked > this out. > > They may sound different, but none will be accurate. Digital audio has > no such limitations.
I agree that digital has no such limitations - and sounds better for it IMO - but your explanation of RIAA EQ is way off... it's basically a severe curtailing of low frequencies at three turnover points to preserve the integrity of the cutting heads and make it actually possible to cut the record withput serious distortion in the first place - the RIAA eq circuit in the playback chain reverses the process, somewhat like Dolby or DBX NR compansion... albeit inaccurately as you say. Even worse, many record labels and cutting/pressing plants didn't use the RIAA curve, they used their own flavour... -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - Audiolense 3.3/2.0+INGUZ DRC - MF M1 DAC - Linn 5103 - full Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters, Blue Jeans Belden Digital,Kimber 8TC Speaker & Chord Signature Plus Interconnect cables Stax4070+SRM7/II phones Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything. ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=85590 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
