Archimago wrote: > Interesting history there Arny... I assume the effect must have been > transparent. >
Listening tests of this device were among our early adventures with ABX: http://djcarlst.provide.net/abx_digi.htm > > Also I presume there's an AD/DA in the device. > For sure. It was said to be a proper 16 bit device. Its clock rate may have been adjustable in the 40-50 KHz range. The dB article that I referenced seems to be the sole surviving piece of doc that is stored in public. It was tested quite exhanstively, and found to be sonically transparent. Those tests is the origin of my interest in testing gear with a set of keys, jangling. This is quite demanding, and just about everything in a good studio in those days would fail to be transparent enough to pass ABX tests. > > What kind of conversion quality are we looking at with the ADD-1 back > in the day for these LP's!? > I don't have a sample to test, but from analysis of LPs that appear to be cut using it, I would speculate somewhat informedly that it used analog filters, R2R conversion, and the analog filters were very gentle by modern standards. The transistion band appears to be huge by modern standards. > > I'm sure Michael Fremer would have no trouble identifying these > digitally compro> mised LPs :rolleyes:.[/QUOTE wrote: > > > > > > I'd guess that a very high proportion of LPs that were cut from 1979 to > > 1989 were cut using it. IOW, during production they were digitized @ 16 > > bits, and were brick wall filtered at 24 Khz or thereabout. I don't > > beieve that he has complained about even one instance of this. > > > > For example, every legacy copy of the DSOTM LP probably received this > > treatment. During loud passages, the brick wall and rejection band is > > covered up by the nonlinear distortion that is inherent in the LP > > format: ------------------------------------------------------------------------ arnyk's Profile: http://forums.slimdevices.com/member.php?userid=64365 View this thread: http://forums.slimdevices.com/showthread.php?t=108499 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
