DACs - what exactly do these things do?


Howdy.

So I recently bought a Sony HAP-Z1ES so I could rip all my CDs in ALAC and keep them on the internal hard drive. I didn't want my iTunes on my PC to get bloated with 55mb songs when the vast majority of my listening is through my phone, car or work computer, etc - so uncompressed files don't make that much of a difference to me, except when listening on my home stereo. I rip them at full ALAC, move them over to the Sony, then delete in ITunes (after I make a mp3 copy that I leave no my computer so it can stream through iTunes Match, or whatever it's called)

So I see tons of "DAC"s out there, but they offer no internal storage.
What exactly is the purpose of these? 

To access full sized files off your computer and play through your stereo? If so, why not just use iTunes and store everything in ALAC?

Is it about the actual digital to audio conversion and they put out a higher quality audio signal?

Sorry, I am confused as to why someone would pay $2k-$5k for something that simply converted digital to audio, when just about every component out there and in most people's systems already do the same.

Please educate ?? I am sure some of my assumptions are incorrect...

Thanks to anyone who responds.
babyseaotter99

Showing 1 response by maplegrovemusic

There are dacs that strive for neutrality and utmost transparency . They are staples in studios . There are hifi companies that make dacs and who knows what their goals are in designing them . Its all about manipulating  frequency response . What frequencies do you need be boosted to make a great sounding dac in your system . I think it is easiest to go for neutrality in a dac and add the frequencies you want to manipulate in other areas .