I got a pair of headphones recently and I really like the way they sound except for one thing; it seems to be on rare occasions, I’ve only found a few songs as an example, but sometimes vocals sound a bit strange. I don’t know how to describe it really; almost coarse and not smooth in the upper mids and lower treble, kinda like a cold, digital sound. Is this what people refer to as grain? The thing is it hasn’t come up that often for me. So it makes me wonder, is it actually the fault of the headphones, or more to do with the recording? I feel like if it were the headphones I would hear it more often than not. Just wondering people’s thoughts about this. Thanks!