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發表於 2017-8-6 08:22:20
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Hi spang123 hing,
for dsd512x , no need to have sigma delta DAC for good result (I did have one T+A DSD8 too, I have 4 DACs which can support DSD512x) . but is it the best way for upsampling to DSD512x , it depends.
some DAC prefer DSD256x over 512x. some DAC prefer for sending them DSD128x instead.
with SGMS server deployment, I have tried > 20 different DACs, from Audio NOTE DAC, Wadax Atlantic, MSB, dcs Vivaldi, CH Precision , EMM Labs , Aqua , totalDAC , Rockna and Metrum.
Some of them does not do well with DSD256x ~ 512x, but they did REALLY well with PCm, For example Devialet D1000Pro sound very good with 24/192.
However, is it mean DSD512x can uplift a DAC to be top notch one? As SGMS team is the pioneer and shared the seminar with regarding DSD512x in Munich Show last year. We did some research when they go to HK, and we did more testing in last 12 months. DSD512x can uplift a mid level DAC to near top notch one (like B++) . but it cannot make the DAC the best (A++).
There are still many different factors contribute the sonic performance.
For HQPlayer, when we are doing dsd256x and 512x upsampling or not , do HAVE quite some different CPU requirement.
For bit perfect output, a Intel ATOM CPU can do the job well. but for pcm to dsd real time conversion. it is CPU intensive and it also depends on the filter you pick . some filter takes more CPU cycle than the other.
Some filter and DAC even they can accept DSD512x , got digital sonic signature and sound thin.
只是小弟小小分享，唔好意思。
Best,
Blau
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