Quote:
Originally Posted by
robm321 
The best sources other than live sound for me is:
1) a live brodcast from a radio station through a high end tuner
2) analogue tape
3) vinyl
4) DVD-A
5) SACD
6) Redbook
FM is generally limited to 15Khz, though I agree it can sound great, I grew up with Stereo FM from my dad's attic room using a big-arsed roof aerial, amazing on Radio 3 classical broadcasts such as the proms.
Vinyl, is technically inferior on many parameters to redbook, not least noise, distortion, potential dynamic range, linearity and speed stability, some theoretical superiority on transient response, better at square waves, goes above 20K, DBT experiments seem to suggest AD of vinyl does not audibly degrade signal (BAS, matrixhifi). Information theory analysis suggests more or less equivalent to 13 bits over 20 - 20K range. Noise unavoidable, quiet classical passages noise very intrusive. Radial tracking means groove contact optimum only for limited range, maximum output alters as reach center of disc, difficulty tracking high energy high frequencies at center, bass summed to mono below 90hz no big deal, not directional, relatively poor channel separation. Only gets close to technical limits with very expensive players (read quiet) and pristine vinyl, absurdly sensitive to environmental factors.
DVD-A/SACD - Blech and Yang (2004) suggest *extremely* difficult to hear difference between two on a format basis only. Supposed theoretical advantages on both, real academic holy war.
High res/redbook - no strong empirical evidence to suggest audible differences in format only, no DBTs showing ability to detect differences, only one journal paper somewhat disputed (Meyer and Moran, 2007) but null results from large sample. Can Sony or Philips please replicate this study ?