In my experience I will hear a shimmering effect that sounds like a tremolo where the volume of the hi-hats and other cymbals are fluctuating. It also causes the overall sound of cymbal crashes to be mushier and less distinct. In addition I've noticed an effect where certain sounds such as the attack of high-gain guitar is stretched and doesn't sound consistent throughout a song. It seems like these artifacts are most noticeable in higher frequency ranges or perhaps transients.