Would you rather buy device/ dac with 2 optical inputs or you wouldn't mind 1 optical input and use '2 in 1 out' optical splitter instead? Does the introduction of a splitter has any influnce on sound quality? Is it safe to use? ( ie you send 2 signals from 2 different devices via the splitter at the same time into the 1 optical input of a DAC). Is there anything to look for particulary while searching for an optical splitter? Any thoughts appreciated.