Hello everyone, I'm a novice in this music conversion because before I had an Ipod that as we all know has been obsolete, buy a FiiO XI II and I'm trying to get the highest possible sound quality my question is about the formats I have in AAC at 320 bps and 44100 HZ I passed them to Flac 24 bits since 192 bsp is the standard of these files but I do not know how to put them if 48000 or more the headphones are Audio -AT m50x technics ¿what do you recommend?