drmatt wrote: > The CD distortion artifacts are only 50db down from the peak signal too > in the -60db sample. >
*Only* 50 dB down from - 60 dB? Until digital recording that kind of performance from a recording was long-frustrated dream! That's better than most amplifiers and preamps that were in use in the day. It's better than most professional recording microphones and mic preamps. > > Or was the turntable sample -scaled- to -2db after it was captured? > What is not shown is all the effort it took to get the analog turntable results as good as they were. If you play a high frequency sine wave from analog tape or LP, its level often shifts around by several dB with no help from anyone! It's audible if you play back pure waves. Music tends to mask it. The test shown rolled the LP's frequency response very sharply below 300 Hz to avoid corrupting the linearity measurements with the massive amounts of low frequency noise that is always there. In contrast, a sine wave recorded digitally and played back on just about any CD player is far purer than the most perfect test signals most of us worked with back in the day. > > The CD graph is clearly way better than the LP if they're both 0db > samples though, and that reflects a real, audible improvement .... The peak levels can be easily read from the graphs that were provided. Really close to 0 dB. 2 dB is a nit. The stability of the performance of the CD made it easy to get the levels to be what I wanted. The LP's typical lack of stability was very frustrating to work with. Most people I know who measure LP playback the first time wonder how we could stand listening to such a mess, and how people can possibly prefer it today in the face of far superior alternatives. ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=105507 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
