FYI, I had a 2D and, like you, wanted to smooth out the upper reaches of violin (and brass) overtone.
My switch to the 3 accomplished much of my goal and a further update to the 3A made even more of a difference--in other areas as well but what I most wished was string sound approaching the real thing.
I finally dumped the Modulus but only from laziness as I wanted a PA with remote. I still believe it to be a fine choice for those who wish a very lovely sound with most of the "audiophile" traits (image, soundstage, dynamics, etc.) well in evidence.
I personally know of no real modifiers of the AA line which has always surprised me since there are so many of these units out there.
My switch to the 3 accomplished much of my goal and a further update to the 3A made even more of a difference--in other areas as well but what I most wished was string sound approaching the real thing.
I finally dumped the Modulus but only from laziness as I wanted a PA with remote. I still believe it to be a fine choice for those who wish a very lovely sound with most of the "audiophile" traits (image, soundstage, dynamics, etc.) well in evidence.
I personally know of no real modifiers of the AA line which has always surprised me since there are so many of these units out there.