A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input)

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Joined 2002
Hello,
380+100 would be a bit to close to 500 for me. I think getting a regulator at the spot where it is '' used '' would always be better. You could even add a small RC network to give it a little extra.
I will need two different supplies when i will go for the roon nucleus. Both will be LCRC or LCLC followed by some kind of regulator. For the wave IO i started with LCLC and a Belleson regulator right away because one of the members here reported good results.
I am almost sure that starting with a well chosen transformer and diodes combined with LC network will make differences between regulators smaller because there is less to filter because the choke will give the diodes and transformer a load that has no charging pulses.
Greetings, eduard
 
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Joined 2002
BTW if you want to save some money, you can buy a nuc and a passive cooling case (I have one from akasa) and put roon rock os (official roon os and its free) on it. I have my room server set up this way and from what I know its the same as the nucleus for about half the price or less
Hello,
Yes, i have read about this possibilty. Also read that the stock Roon power supply can be replaced by a better one. lol.
I dont know if saving the money would trigger me to go for the DIY Roon. Usually DIY is so time consuming and i just dont wanna do DIY that much anymore.
Building a new seperate power supply while the old one is still working is ok. But one the power supply is integrated like in my DDDAC it usually takes a lot of time. I built my DDDAC in a kind of modular way. SO for the berrystreamer mod i can make a new backplate at work that will hiold the new power transformers and chokes and that will just come down to swapping plates. When i constructed my DDDAC chassis i made it inn such a way that by changing one plate into a same seize plate with a different hole pattern i could use other components easily.
Greetings, eduard
 
Is the Kali board a huge upgrade for the waveio?


In my setup, YES. I guess how much will depend on how the rest of the system performs before adding Kali. I have been working over the years with the same speakers and amps, and have done a lot of tweaking to get the sound I have today. I change the cables internally in my speakers to Nordost Valhalla + I have the Valhalla cables as speaker cables. The crossover filters are also tweaked to my taste.(Resistors and caps). Many don’t believe in cables, I do, and all cables from usb to speakers have been choosen after a longer listening period. It’s not easy to hear what’s going on in the beginning, but if there is a change to the better or worse it will stand forward after some time. Quick change from one cable to another, don’t work for me.

In general I will say that it seems that Kali add some detail and clarity and voices have less ssssssibilants. A nice upgrade for small money.
 
In my setup, YES. I guess how much will depend on how the rest of the system performs before adding Kali. I have been working over the years with the same speakers and amps, and have done a lot of tweaking to get the sound I have today. I change the cables internally in my speakers to Nordost Valhalla + I have the Valhalla cables as speaker cables. The crossover filters are also tweaked to my taste.(Resistors and caps). Many don’t believe in cables, I do, and all cables from usb to speakers have been choosen after a longer listening period. It’s not easy to hear what’s going on in the beginning, but if there is a change to the better or worse it will stand forward after some time. Quick change from one cable to another, don’t work for me.

In general I will say that it seems that Kali add some detail and clarity and voices have less ssssssibilants. A nice upgrade for small money.
Thanks! Guess I just have to try it out. Just ordered the lt3045 shunts for the dac and main board. Hopefully pretty good bang for buck upgrade.
 
Remember to choose the right oscillators on Kali. 22/24xxx or 45/49xxx, it depends whats in front of Kali. Waveio have 22/24xxx and the same shall Kali have. Since dddac doesn’t support higher than 192khz there is no use for other than the 22/24xxx in combination with waveio. If you put on 45/49xxx oscillators and you only need the 22/24xxx, you will only add more phase noise from the oscillators. In other words, the clocks that shall be reclocked perform best with the same mhz value from the clocks in the front end.

Ps; I wonder if waveio now can be ordered with either 22/24 or 45/49xxx types.
 
Remember to choose the right oscillators on Kali. 22/24xxx or 45/49xxx, it depends whats in front of Kali. Waveio have 22/24xxx and the same shall Kali have. Since dddac doesn’t support higher than 192khz there is no use for other than the 22/24xxx in combination with waveio. If you put on 45/49xxx oscillators and you only need the 22/24xxx, you will only add more phase noise from the oscillators. In other words, the clocks that shall be reclocked perform best with the same mhz value from the clocks in the front end.

Ps; I wonder if waveio now can be ordered with either 22/24 or 45/49xxx types.

How does one choose the correct oscillators on the Kali? Does one order with this specification or can it be changed ourselves post the stock kali unit purchase? How can i check which oscillator is on my kali unit?
 
Remember to choose the right oscillators on Kali. 22/24xxx or 45/49xxx, it depends whats in front of Kali. Waveio have 22/24xxx and the same shall Kali have. Since dddac doesn’t support higher than 192khz there is no use for other than the 22/24xxx in combination with waveio. If you put on 45/49xxx oscillators and you only need the 22/24xxx, you will only add more phase noise from the oscillators. In other words, the clocks that shall be reclocked perform best with the same mhz value from the clocks in the front end.

Ps; I wonder if waveio now can be ordered with either 22/24 or 45/49xxx types.

Newer versions seem to support up to 384khz. I have used my Waveio DDDac at 352 without issues.
 
Remember to choose the right oscillators on Kali. 22/24xxx or 45/49xxx, it depends whats in front of Kali. Waveio have 22/24xxx and the same shall Kali have. Since dddac doesn’t support higher than 192khz there is no use for other than the 22/24xxx in combination with waveio. If you put on 45/49xxx oscillators and you only need the 22/24xxx, you will only add more phase noise from the oscillators. In other words, the clocks that shall be reclocked perform best with the same mhz value from the clocks in the front end.

Ps; I wonder if waveio now can be ordered with either 22/24 or 45/49xxx types.

The DDDAC dac system itself supports 384kHz without any problems by the way. The limit is the I2S or spdif source
 
Ok, thx doede, but I thought dddac was limited up to 192khz. If I understand you right a waveio with the 45/49xxx oscillators that support 384khz will work fine on dddac ? Or is the 22/24xxx oscillators a better choice ?



I think that there should be no difference as there is no oversampling and the DAC chips in the DDDac get their only clock signal over the delayed i2s from the i2s source.
Would be interesting if the PCM1794 works better with a certain frequency clock. Couldnt find a recommendation on the TI website though.
So as long as i2s doesn't generally work better with a certain clock type I can't see why it would matter.
But perhaps someone with some knowledge can confirm/correct me :D
 
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Something funny going on here but unable to find the aswer to the problem.

95% of my music sounds great but some of them seem out of phase :eek:

For example;

Tears for Fears: Raoul and the kings of Spain: Humdrum and Humble.....

This track begins with a rhythm guitar lick from left to right.
It begins left but when it should go to the right it fades kinda in the backround.

Lee Ritenour: 6 string theory: '68'

3 guitar players soloing one after the other...
The first 2 sound great but the third player sound faded in the backround...


I have checked everything over and over but i cannot find the problem....
Anyone have a clue

Well, i think i got the fix for my "phase" problem......

I'm playing with a Rpi/ISOLATOR/KALI setup with VOLUMIO
I was playing "native" in VOLUMIO setup but when i changed the bitdepth from native to 24 bit my problems where past tense.....why, i don't know but happy with the result though ;)

Then something else, i also replaced the most important regulators on the 1794, the LF50 and 8 x LF33. The LF50 was easy to do, the LF33's were a pain in the behind. I didn't have any experience with desoldering, thats why :rolleyes:
Anyway, eventually i got i right and got the regulators nicely soldered in.

I gave it a few hundred hours to get settled and was amazed what it brought soundwise....
BTW, this was way before my phaseproblem fix so no upsampling compromise, just to be clear here....

This is how i discribe it, when you hear music you tend to here the lot, every instrument and vocal becomes one when it rolls out of your loudspeakers.
Now it is much different, it is still one but when you listen you can pick each and every instrument or vocal like a detail from the music without effort.
Detail is amazing!

So smooth dancer, thanks for this :cheers: great upgrade