what is 1x oversampling

= no oversampling, sometimes referred to as 'zero oversampling' or 'non-oversampling'. Unfortunately, there is ahighly misguided idea out there that using a non-filtered non-oversampled DAC is a good idea, apparently propagated by people who do not understand what aliasing and intermodulation are all about...
 
ilimzn said:
= no oversampling, sometimes referred to as 'zero oversampling' or 'non-oversampling'. Unfortunately, there is ahighly misguided idea out there that using a non-filtered non-oversampled DAC is a good idea, apparently propagated by people who do not understand what aliasing and intermodulation are all about...

careful with those words... :D

I'm assuming 1x oversampling means no oversampling; the CD player has a ladder type of DAC which operates at 44.1KHz.