Altec,
I think the newer digital one is similar to the old analog one based on the levels on my Parasound didn't need to be changed when I used the digital one to compare before my analog unit broke. The DTS and AIX discs I used as supposed to compensate for the low bass roll-off issue of the old analog meter. Using the Outlaw mike, everything sounds very bass shy. Recalibrating using the RS meter and discs, the bass is back. That is why I wonder the past discussions of comparing white noise (Outlaw) vs. pink noise (test discs) which accounts for the bass level difference and how it performs in my system and to my ears.
Slbenz