I recently did the iTunes 11 upgrade on my Mac and noticed the sound quality was immediately worse. A lot worse. I've always noticed a slight improvement using Audirvarna instead of iTunes, but now it's a massive difference. Any idea what changed with iTunes 11 or how to unchange it? 

I'm looking for a desktop (can be portable as well) amp / dac combo for < $300 (ideally) that sounds better than the audio straight out of my MacBook Pro. I just auditioned a NuForce Dia, which I had bought to power some desktop speakers and also used it for a headphone amp. Honestly, I could...

I received an iBasso D2 several days ago, and I like it so far, but I noticed today that the left and right channel volumes appear to be slightly different, the left channel being louder than the right. It's clearly evident when turning the amp volume very low, such that I can quietly hear music...