It doesn't seem to say anything like that. Looking at it again, I see this: > It is also worth mentioning that increasing the bit depth of the audio representa

It doesn't seem to say anything like that. Looking at it again, I see this: > It is also worth mentioning that increasing the bit depth of the audio representation from 16 to 24 bits does not increase the perceptible resolution or 'fineness' of the audio. It only increases the dynamic range, the range between the softest possible and the loudest possible sound, by lowering the noise floor. However, a 16-bit noise floor is already below what we can hear. But I don't understand, why is this? Is the step in volume between two values fixed regardless of the bit depth? If so, why?