10-23-15: GeorgelofiGeorge, my view is it is not fair to judge a dac chip by itself without considering the overall quality of the dac & skill of the Designer (ie: implementation). I own a Vitus SCD-025Mk2 which is a $20kEUR dac/cdp which I can say hand on heart is the best single box cd player i've heard (including a CH D1 with the dac option & Accuphase DP-700).
Ricevs right, the AD1955 is bit of a hybrid a 5bit Multibit and Delta Sigma, no R2R ladder. And far cheaper to manufacture than say a real R2R Ladder like the PCM1704K.
Sounds like an each way bet on the cheap, trying to get what Multibit can do yet still do DSD.
Cheers George
As a dac, the Vitus bested my previous Vimak DS-1800Mk2 which I regard as the best Delta Sigma dac ever made. I also previously owned a highly modded Ayon CD-5s which uses a quad of BB PCM-1704k chips. I enjoyed my time with the Ayon which did some things very well & was a fun player, though the Vitus is in another league altogether.