Found alot to read thx!
Maybe 32 not a limit, but that DAC's too expensive though. Need some experiments with lame copy-paste engineering from existing http://www.ucapps.de/mbhp_shx8.html version with demuxing maybe...lol. I hope someone experimented with this and will post here - it's so easy for qualified ppl as ADC muxing at which MIDIbox is very strong.