Apart from the issue that you both bring and discuss up on the effect on the sound of the minor or major ripple in the power supply, you do not see anything good to the use of clean power with supercapacitors at some key point of clean power for our LKS, I know that they are dangerous in the sense that they are capable of giving enormous momentary currents.
It seems like a lot of new digital audio products are going that way. What do you think of B0bb and Xoverman?
Other example:
https://www.audiophonics.fr/en/powe...-capacitor-conditioner-board-33v-p-14590.html
If one day I make an external power source superior to the current one, it could be a technology to take into account whenever it is really beneficial for the sq.
Supercap supplies are quite different from the supplies used in the 004.
You would have to install one into the 004 to make the determination if its claimed performance benefits is worth the hype.
In order to retrofit this type of supply you will need to add a power delay circuit.
This allows the supercaps time to charge.
SU-6 which uses supercaps has this type of mechanism and it takes about 1-2mins to completely start up.
This is complication is not often discussed and you will have to plan for this.
The supercap board you linked looks like a good starting point, you will need 4 delay circuits , 1.2V DVDD/VDD, 3.3V AVCC, 3.3V VCCA/XO.
Check the schematic to see if the UCC board includes some sort of built in delay.
This sequencing is required to make sure the 9038 starts up properly.
The additional delay circuit is for the microcontroller, we do not want the microcontroller programing the DAC operating conditions before the DAC is fully started up.
It must be the last to start up.
During the entire start up phase, the audio output must remain muted, there will be additional work required to adjust the delay for the audio muting relays.