In the main player screen, press the "options" button (The one to the bottom left) and select SRC. Then from "Native play", go to one of the resampling options like 24/96, then back to native play
You can use all the outputs at the same time with no issues - We actually tried it at a local meet. Always fun to see a DAP feeding two DAC's, an amp and two sets of cans at the same time
Lol how was the sound quality when powering 5 things?