They describe it on the Kitsune website.
It is actually complicated but similar to Jussi’s open source design DSC1.
But it is a discrete design, not using an off-the-shelf D to A chip.
This post already in this thread might help (see photos)
So it looks like overall Jeff @ Holo did a good job filtering the higher ultrasonic noise, with half the number of elements Cyan 2 has ?
There is apparently a new Holo Spring 3 with preamp (from Serene).
In DSD Direct, the preamp can be used or not? I didn’t see clearly if it was digital or analog.
DSD Direct is only relevant for the DAC part - all Holo’s are discrete design.
The preamp is just analogue volume control, nothing to do with D to A.
I don’t think this is new. Maybe new to Audiophonics web store ?
Preamp has always been an option for Spring 3. I bought mine in 2022. Nothing new there.
Yes, the analog section looks like 2nd order low pass based on measurements. Of course half the elements means there’s a bit more left over noise. So if you want flat noise floor with DSD512, you need to use 5th order modulator. But even with 7th order modulator the noise level is lower than inherent audio band noise of 16-bit source content… Same for 5th order modulator at DSD256.
So the amount is roughly same you get for example from ES9038PRO chips with 44.1k PCM input.
Much less ultrasonic left over noise than SMSL D-6 for example.
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A 7th order filter is superior to the 5th ?
For DSD512, is 7EC preferable to 5EC ?
So I deduce that we can use the Holo preamp with DSD Direct.
Indeed, on my RME ADI2 in direct DSD, the preamp cannot be used because it is digital
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For the PCM folk, linearity is good to use 18 bits with Cyan 2?
Or 16 bits recommended ?
Depends on your DAC and amplifier mostly. Not outright superior, especially with EC modulators.
It depends… For class-D amplifier, I would try both options. Otherwise you can usually just go with 7EC without thinking more about it.
Correct, analogue vol control
Correct
OT: I always used 20 bit for the Soekris 2541. Is this to much?
No idea, it depends on linearity measurement. Would need to measure it or see if someone measured.
16bit would be safer than guessing 20 bit (better to be conservative)
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With RME ADI2 in direct DSD with NAA HQP, I regularly have clicks/plops when changing tracks or albums in manual, but this also happens in automatic playback.
I have a doubt about the settings I put in HQP Desktop (see screenshot)
Should “Adaptive Rate” be checked or grayed out?
Should “48 DSD” be checked?
“Short Buf” and “Quick pause”, is it worth using them or not?
Boom You design it and we manufacture in China.
I got 50k for that.
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20-bit is good with Cyan 2 as well.
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From Roon? Try setting Idle time for example to 30 seconds or 60 seconds. So that you have enough time to change tracks/albums before it times out.
Looks good, but how are your SDM settings? Have you tried with NAA OS?
yes from Roon.
Where is Idle Time?
NAA is installed on NUC/Dietpi, would NAA OS be better?
