Fairly sure that they will both work simultaneously – outputs generally do – I would however not recommend plugging anything into one set of outputs whilst your playing audio through the other – depending on how they are wired p then plugging that in can cause ‘Bang”/Static noises through the output you are currently using whilst you are plugging it in…
(I found this out the hard way using the 2 sets of outputs from my mixer all at the same time – didn’t realise they would be plugged in in parallel with no protection.. Rather loud noise through my speakers (and the other set I was plugging into)..
I always turn everything off before I do that again now…)
bob6397