The Holo Audio Spring had 4 resistor networks. Two handle PCM and are R2R. Two handle DSD in a similar fashion to Jussi’s SC-1. Within each group one network performs the processing and the second is used to correct linearity.
The surface mount PCB with the resistor networks is double sided, repeating on the underside:
Wow! Now I’ve more reason to up grade my Zotac i5 fan-less Mini PC to a more powerful ones. I was thinking of this:
Not sure it is up to its task to up sample to DSD256 or even DSD512 from Redbook?
The loud ‘pop loud’ seemed to happen when Holo Spring is used in Linux OS, I read from Computer Audiophile, but Windows with the Holo Spring driver shouldn’t have any loud pop, probably some low level clicks when switch tracks.
I’m not sure about Rockna wavedream DAC, there’s no mention in the website that they can do direct DSD conversion in the R2R converter. Is there’s a possibility that Rockna convert DSD to PCM to the the R2R ladder DAC? If there’s the case, there will be little SQ difference between different DSD sampling rate. Again this is just speculation but it will best to ask Rockna directly.
Thanks @Wei_Xia1, looks like I need to build a custom designed PC with i7 and Nvidia GTX-780 graphic card to do DSD512. This is going to be tough. Any off selves ready made PCs that may contain the above components that I can purchase directly?
Sound gallries SGM is a beast audio PC for T+A DSD512, but for that price, I’m not going to pay for it even my wallet is heathy enough. It’s just my personal opinion or my personal attitude towards what kind of things I should splash out or not.
GTX 780 is not good enough I’m afraid, flagship serious double-precision graphic card like Titan is a good choice. But please note that HQplayer relys on CPU more than GPU, so a powerful CPU is crucial. (Jussi is a nice person, mentioned the setup lots of times since so many users ask him the same questions from time to time)
The Noise from the fan is also a factor to consider, CPU water cooling system or low-speed, low noise CPU cooling fan is the way to go.