Signalyst DSC1

Since I am using Amanero, the second power feed is not used (for BBB).
The trace is cut (ground is on dirty side) to feed an off board 5V regulator to the onboard 3.3v regulators for the clocks separately,
Ferrite bead is not used, just 5V directly to LP5907.
This is an easy and very positive upgrade.

By the way, the bypass capacitors are all upgraded to Rubycon MU.

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Any concern changing Vccb on 8T595 from 5.5v to 3.3v to lower the output -4.4db?
I see bandwidth wide enough from the spec.

Reason about that is the transformer performs better with lower input (-8db to -10db from HQP)
With PCM material, HQPlayer can control the volume.
While for DSD material, with direct SDM volume control is disabled.
You should hqplayer letting remodulating the DSD source, sounds better. More often then not, DSD source modulation is not all that good. In addition, source material, if good quality without too much compression, almost always is at -10dB or less at average. Exactly there where the DAC performs optimal.
 
For some reason I see people sticking with Amanero and Beaglebone.
After more evaluation, I come to the same conclusion that Pavel Pogodin already came to when he discovered the Xing U30. It just sounds much better then these original options. Everyone that I know who switches from Amanero to Xing U30 is saying "should have done this much earlier". If you read the documentation that Pavel provides for the DSD'it on puredsd.ru then you can also see clear indication how to modify the Xing U30 for this purpose.