DVD Audio is a different format, similar to SACD I think. 24/96 and 24/192 are high resolution methods of recording music. You must use a laptop or computer to pipe 24/96 or 24/192 music tracks into your DAC, but to play DVD-A or SACD discs, and these formats only comes on discs as far as I know, you need a compatible CD player. DVD-A has pretty much gone the way of the dinosaur, SACD won that battle. Check out SA-CD.net for current titles. I don't think the SACD signal can be sent into the DAC you have, you'd need a new player.
If you own CDs currently, you can rip them to a lossless format like .aif or .wav and they might sound better on your iPod, but this depends heavily on how you get the signal from the iPod to your vehicle's stereo, typical methods for this harm the sound quality and won't beat the SQ of an in-dash CD player.
You can rip your vinyl to digital files, using a number of different software packages, and play them through your DAC using iTunes, JRiver or FooBar from a computer or laptop. You can do the same with your CD collection, just use lossless formats, not .mp3...
If you own CDs currently, you can rip them to a lossless format like .aif or .wav and they might sound better on your iPod, but this depends heavily on how you get the signal from the iPod to your vehicle's stereo, typical methods for this harm the sound quality and won't beat the SQ of an in-dash CD player.
You can rip your vinyl to digital files, using a number of different software packages, and play them through your DAC using iTunes, JRiver or FooBar from a computer or laptop. You can do the same with your CD collection, just use lossless formats, not .mp3...