Oversampling: How and Why

[the_bertrum]

I'm familiar with only a few DAC chips or chip families that support what's called Oversampling Filter Bypass. There may be more.

Burr Brown PCM5XXX. When this chip is fed a 384kHz rate it's internal oversampling filter is automatically bypassed.

I guess I was just lucky to have got one of these then. So upsampling on ones without a bypass will result in the DAC applying a filter even if it is fed at its native rate? I guess this is why I'll never fit in with objectivists, I don't understand the maths and have to go by what I hear.