If it results in distortion then it is measurable. If it is above a certain level it will be audible. If it is audible then it's a lousy DAC sell it to an audiophile and move on. DACs that are well engineered DO NOT have sound signatures they are considered audibly transparent
I hate to break it to you, but no audio equipment is 100% transparent.
I hate to break it to you, but no audio equipment is 100% transparent.