buhofex

(Sorry for my english) I have 11 tracks (.wav mono and stereo) and i have 2 Motu 828x, first motu with 8 outputs from display 1 and 8 outputs with display 2, sometimes when i start the show from the second motu i heard noises like digital noise, the fast solution it's to restart the WO, can anyone (if you understood anything i said) explain what's happening?