Even today, some artists of all genres prefer analog tape, claiming it is more "musical" or "natural" sounding than digital processes, despite its fidelity inaccuracies. Due to harmonic distortion, bass can thicken up, creating a fuller-sounding mix. In addition, high end frequencies can be slightly compressed, which some claim is more natural to the human ear, though this claim is difficult to quantify due to the very personal aesthetics as to what is 'natural' sound. In this century, it is not uncommon for some artists to record directly onto digital equipment and then re-record the tracks to analog reel tape (or vice versa) for this effect, which can sound pleasing or "warmer" due to the increase of even harmonics that can often enhance musicality, much in the way vacuum tube amplifiers are preferred over solid-state devices for the same reasons. In addition to all of these attributes, tape "saturation" is a unique form of distortion that many rock, blues and funk artists find very satisfying, though with modern technology, these forms of distortion can be simulated digitally.