Some people say that they can hear the difference between 320kbps and wav. If your stream is MP3, there is no way you can hear that. Use AAC+ yeah it could be but for the far most people it makes no difference. Listening through a phone speaker or laptop and no studio monitors, nobody will notice any difference.
Personally i am switching to WAV because it has a little more dynamic range in comparison with MP3. That is more if you listen locally because as said, on the outgoing stream it's hard to notice any difference. My best result at this moment is WAV, with good audio processing on a stream and make it AAC+. My stream at this moment is 128kbps AAC+ but the majority is MP3 files that are played. You can have a listen at
Radio 251 and see how that sounds for you. Keep in mind that processing is doing a lot good but also can do a lot wrong to the sound if not set right. To setup a processing, it's a process
