Does not react to audio files (MP3) with high bitrate (256).
Lol 256 is not a high bitrate. I'm using with FLAC files playing over 1700kbps with no issue. Of course everyone's hardware and setup is different. Just wanted to clarify though that 256 is considered slightly lower than the norm of 320kbps.
Try using high quality FLAC with a good pair of headphones and you'll be amazed at the difference :)