Spent countless time reading about audio, including electronic related to audioamp, DAC and preamps, loudspeaker and driver's physics. I have a huge collection of data sheets from different DAC, opamps, buffers from the 80's up to the current ones, books about solid state or Valve amplifiers design.
Started computing when PC had no audio. Earned quite a bunch of dedicated audio card, since there was no onboard. Had both end user and professional grade ones, even with swappable OPAMPS.
Been reading real reviews, not just gaming site testing onboard chipsets. Do you know the effect of filtering chocks orientations on the audio signal ?
Listened to the difference between onboard, dedicated and DAC with headphones in the several hundreds euros price tag.
Audio is my passion, it is way over a hobby thing. Gathered, read, learnt and experimented extensively on this subject for years.
Obviously all chipsets has DAC .... Else you couldn't have any sound since it is an analog signal.
Obviously they all have a preamp stage else you'd have no gain, most of the time it is just an all in one chipsets that does DAC, preamp, volume control etc..
You do not need figure, but I can send you plenty. The best judge are you ears, marketing bullshit will never fool trained ears.
Also, audio is like wine, you don't have to spend a fortune. All you need is to forget about the marketing. Trust your senses.
Those 1220 chipsets are nice for daily use and days better than chipsets from the past .... But they are just no match to something even semi serious like an mAudio or a Lynx audio card.
If all you want is decent sound then they are good and inexpensive. But I can't let you say they are top tier