Re: "Make sure to get a DSD Dac that can play DSD128."
Bigger is better, right? So why would Charlie Hanson of Ayre Acoustics, a company whose components typically retail in the $5-$10k range, opt for single-rate DSD in his latest upgrade?
Check out this observation from Andreas Koch, one of the original developers for DSD and more recently, DOP:
"Double rate DSD pushes the noise shaper up in the frequency domain... That is most interesting for recording and post production when the intent is to release the product in DSD, because DSD2x gives the extra headroom that recording engineers need in order to record and edit without causing any degradation when releasing their final product in single rate DSD.
It may also be interesting for hobbyists who for instance want to archive their analog music library to a digital format. In such applications you may not care about the extra storage space that is required and you certainly wouldnt be bothered with bandwidth bottlenecks when sending DSD2x files through the internet.
However, as a delivery format from studio to end user, SINGLE RATE DSD seems to offer an optimal combination of sound quality, bandwidth and storage space."
Single rate DSD seems to be proliferating lately, but double rate? Not as much.
So unless I decide to become a recording engineer, PCM and single rate DSD will remain my high res media of choice for now. And if things change, I'm confident that Ayre will be there offering reasonably priced upgrades.
Oh...and although they are more flooded with orders now, my QB-9 upgrade took 3 weeks.