i do not know if 24 bit or not but my Metrum sounds perfect for every bit... and vola i added Audopilleo 2 with Pure Power (AP and PP respectively) which brings amazing clarity and refinement to Metrum lifting this combo on a whole new level. i choose option 2 for connecting AP and PP with two USB cables out of Mac, one into AP and another into PP.
sonically Audiophilleo opened up the whole spectrum, bass dynamic and articulation become insanely clean so i can hear every drum palpation, trebles get more air and more sophistication ... but the best part of the story are vocals, singer voices never sounded so life-like realistic... i can feel singer entering my room and singing just for me, this gives me great sensations.
funny is i did not expect AP to bring such a refinement to Metrum so now i am a believer. advice and service from Audiophilleo's Philip is top notch, i am so thankful to him for giving me good advice and his patience in explaining things, it was really great experience in all directions.
guys, if you want USB to SPDIF adapter i can only say Audiophilleo is the way to go. it will bring a breath of fresh air into your music and will make your system sound like never before.
love these cute two little boxes i got from Audiophilleo. ahh..... yes..... i got AP2 unit in black and PP in gold....... GoooooLD........... but not for Gold Member