PS Direct Stream latest firmware, "Snowmass"

Upgraded to Snowmass, and there are some improvements but it isn't day and night in my system.   Still like RC a lot.  Never had the problem with hash or edgy vocals with RC.  On some discs, still like RC better.  It might be that I am just so used to hearing RC.  Will definitely do more listening this weekend.  Just the fact that you can upgrade or change the software is really a brilliant feature.

Hate to be a party pooper, but this is same old story as every firmware release.

I upgraded from Redcloud to the T+A Dac 8 DSD, a DAC with a $2,000 less msrp, and it eats the Directstreams lunch in every way imaginable.

Ha! To my ears, he DirectStream with Redcloud is better than the T+A Dac 8 DSD. And Snowmass is a ste up. Then again, for PCM, I like the latest Schiit Audio Yggdrasil better than the T+A Dac 8 DSD...

Will this update come to the PerfectWave DAC, do you know? 

The PerfectWave firmware is not upgradeable. If you upgraded the PerfectWave to a DirectStream (there was a kit for that at one time), then yes, the update would already be compatible.