Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter

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#10,481
eduard said:
Hello,
Chasing the maximum number of updates of existing products and spewing out new items too or giving more support with existing products is a choice.
Greetings, Eduard
Click to expand...

Yes, I'm completely lost on the Product options the last few years. But we have to let Ian grow and not straight jacket him.

It's easy to burn out, but if you R&D something your passionate about it's much easier. So if all his energy and focus is on a FOTM product, so be it.

I'm sure he has no interest in continuing the LiFePO4 Flagship anymore because the UcPure made that product line obsolete. So focusing energy on UcPure/UcBalancer is perfectly fine while having zero interest in LiFePO4 Flagship. The LiFePO4 was a great product and fulfilled a need in it's time.

It's whatever FOTM he is passionate about. If he doesn't have passion for a certain product, it's best to delay.

Who knows, one day he could grow into becoming a pure Audiophile CEO with a soldier of minions under his command doing R&D. But we just have to let him grow.
 
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#10,482
sbelyo said:
I think I figured out the modules I need for a piless stand alone DAC build. Does this look right? For the super caps I found these TPLH-3R0/3000SL60138 Can I use them?


#35C StationPi SMT
#4B ESS Dual Mono II DAC and I/V board
#1D FifoPiQ7
#19D ReceiverPi DDC
#49B MonitorPi Pro
#50A GPIO extender
#7A Transformer I/V (Bisesik)

Power:

#41C UcPure MkIII x2
#41F UcBalancer KIT x2
Click to expand...

The Tecates are fine. Just do due diligence that they are threaded (screw terminals).

SimonJ posted his Tecate (2.7V) setup here:

https://www.diyaudio.com/community/...eapon-to-fight-the-jitter.192465/post-7493335

But for the price of the Tecate 3.0V, you can get the Eaton 2.7V for the same price.

So since Eatons are the benchmark here, I probably recommend Eaton 2.7V over Tecate 3.0V since they are roughly the same price.

There's not a need for 3.0V as the UcBalancer runs default at 2.7V. There's no justifiable upside to running UcBalancer higher than 2.7V.

But otherwise, you should be able to use those Tecates as SimonJ has already set a precedence (should be same size and parameters, just @3V instead of 2.7V).
 
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#10,483
Drive Shaft said:
Initially, I was interested in a Pi-less setup on the off-chance Ian would implement native USB (no clocking) with no third-party USB adapters

But basically, RPi5 made me drop RPi-less.
Click to expand...
Got it, makes sense now. If you have any of these modules and are not using them, let me know


#35C StationPi SMT
#4B ESS Dual Mono II DAC and I/V board
#1D FifoPiQ7
#19D ReceiverPi DDC
#49B MonitorPi Pro
#50A GPIO extender
#7A Transformer I/V (Bisesik)

Power:

#41C UcPure MkIII x2
#41F UcBalancer KIT x2
 
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#10,484
Okay, I'll try to give my opinion at the beginning of the week.

After Ian posted this photo, I think the StationPi SMT is a great foundation as you can go RPi-less or RPi with ease. Others are at a crossroads of deciding between a PurePi MKII and a StationPi. I think the StationPi SMT offers more flexibility. But I need some time to analyze as it's not my typical use case.

It's nice to see Ian using the Apple Remote and implementing IR in the MonitorPi. I had that years ago, but forgot all about it. I hope to revist the IR remote option again after the Group Buy as it was a nice alternative to an iDevice UI.

53285202382_0d82c12a9c_o.jpg
 
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#10,486
Can someone please help me? I've been trying to fix this four eight hours straight now and I'm about at my end.

I can't get anything to play thru the opa861 i/v board. Using station pi pro everything is powered correctly.

I've used with and workout a reciever pi 2 using different combos of jumpers at j14 and different ess and monitor pi pro settings. No matter what pcm or dsd with or without dop nothing.

Using only usb input from rpi, fiopiq7 and no dac chip is in the 9038qm mk2 board. Sync cables hooked up correctly. Used with and without j4 control port on station pi pro to fiopiq7.

I've tried a ton of gentoplayer drivers... Including all the rec ones i2s general ect ect.

Please help. Thank you.
 

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#10,490
badd99 said:
Can someone please help me? I've been trying to fix this four eight hours straight now and I'm about at my end.

I can't get anything to play thru the opa861 i/v board. Using station pi pro everything is powered correctly.

I've used with and workout a reciever pi 2 using different combos of jumpers at j14 and different ess and monitor pi pro settings. No matter what pcm or dsd with or without dop nothing.

Using only usb input from rpi, fiopiq7 and no dac chip is in the 9038qm mk2 board. Sync cables hooked up correctly. Used with and without j4 control port on station pi pro to fiopiq7.

I've tried a ton of gentoplayer drivers... Including all the rec ones i2s general ect ect.

Please help. Thank you.
Click to expand...
I don't know gentoplayer but in Volumio I can select "Amanero USB"
in MonitorPiPro I have to select the "RPi" input (to play from RPi via Amanero) ...but I have stationpi, not pro.
are you sure that you have the OPA861 I/V powered correctly with +/- 5V? it's not very visible in this thicket of red wires... why don't you use different colors for "+" and _-, it would make things much easier ...maybe first make a simple set - RPi + FiFoPi + es3038m dac + OPa + MonitorPiPro - see if everything works...?
 
#10,491
Hi Ian,

Since I am using the receiverpi pro II in combination with monitorpi pro I get a big distortion with 176 en 192kHz files.
Before I used the receiverpi pro (not the II) and monitorpi pro and never had this problem. I didn't change anything in the configuration.
Also using the stationpi pro and fifoQ7 feeding a TDA1541a.

What is different with the monitorpi pro and receiverpi pro II in comparison with the monitorpi pro and receiverpi pro.

Thanks in advance.


Kind regards,
Ad.
 
#10,494
badd99 said:
Can someone please help me? I've been trying to fix this four eight hours straight now and I'm about at my end.

I can't get anything to play thru the opa861 i/v board. Using station pi pro everything is powered correctly.

I've used with and workout a reciever pi 2 using different combos of jumpers at j14 and different ess and monitor pi pro settings. No matter what pcm or dsd with or without dop nothing.

Using only usb input from rpi, fiopiq7 and no dac chip is in the 9038qm mk2 board. Sync cables hooked up correctly. Used with and without j4 control port on station pi pro to fiopiq7.

I've tried a ton of gentoplayer drivers... Including all the rec ones i2s general ect ect.

Please help. Thank you.
Click to expand...
I would start with Volumio and known driver first.

Do you get a “lock” led light on you dual 9038 DAC?

I assume you are using the linearPi to power the Rpi and dirty side of FiFoPi Q7. Have you set the jumpers correctly on the stationPi pro so that single power supply can be used?
 
#10,495
sbelyo said:
These are all the super caps I could find that should work and are in stock at digikey at least. Maxwell does not appear to be carried any longer

XL60-2R9348T-R
XL60-2R7308T-R

SCCZ1EB308SWB

SC3000-270-ASC

TPLH-2R7/3000SL60138
TPLH-3R0/3000SL60138
Click to expand...
XL60-2R9348T-R - This one is unverified but should work, but not a good value for an extra 400F. If the UcPure works well with the RPI4+ one day, I might try for the extra 400F headroom
XL60-2R7308T-R - I think this is it. The key is having a "T" in the part number not "W"

Here's a recent post by Ian:

https://www.diyaudio.com/community/...eapon-to-fight-the-jitter.192465/post-7478538

SCCZ1EB308SWB - Unverified, untested. Easy Pass / Punt

SC3000-270-ASC - Unverified, untested. Easy Pass / Punt

TPLH-2R7/3000SL60138 - This is what SimonJ and a few others (Can't find post as it's been a few years) use. So, it's okay if you are building a large UltraCap farm. For 3.3V or 5V, better to pay a few bucks more for the benchmark Eatons

TPLH-3R0/3000SL60138 - Better to stick with the benchmark Eatons as they are the same price depending on Supplier

I seem to have been mistaken on the price. I might have been looking at my Mouser past orders and not the current product page.

The Eatons 2.7/3000F are $70 not $60.

So depending on your budget, these two should be good to go:
  1. XL60-2R7308T-R @2.7V/3000F @$70 (20+ users verified) [Official Benchmark]
  2. TPLH-2R7/3000SL60138 @2.7V/3000F @$57 (3 users verified) [Unofficial]
I believe you get free shipping in the UK, so free shipping plus Tecates @$57 is a pretty sweet deal. Otherwise, whichever you get the best value should be good. As long as you use UcBalancers, there should be extremely low risk with either.
 
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#10,497
druidaudio said:
Please tell us how this splendid dielectric (Teflon) insulates from RF?
Click to expand...

Long COVID has knocked me out of the game, so my memory is gone and very little energy (burnt-out) left in this hobby.

But for the past decade I had been constantly shooting the breeze with the innovator not the imitador of the FPGA DAC. DAC Awards up the wazoo and likely to be considered in the GOAT (Greatest Of All Time) running for DAC designers. I support him to be knighted for his DAC contributions.

This is part of his mentoring education for I as a student over the years.

Since he has an unlimited budget and can be gifted any Audio equipment upon request in the Industry, he uses exclusively Solid Core w/ PTFE (Teflon). So he's very pragmatic and science-based. He has all the expensive RF testing equipment and 40+ years of Audio Education. A bit like the "Albert Einstein" of Audio, so I trust him as a source for RF matters.

Of course for everyone else cosplaying Audio Pros or getting their sources from Reddit r/audiophile, YMMV.
 
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#10,498
Since I mentioned PCI-E recently, I'm looking forward to trying out PCI-E on RPi5 with my ASM3142 USB PCI-E:

nvme.png


Maybe:

(LiFePO4 6.6V -> LinearPi 5V -> UcConditioner 5V @ up to 100A limited by USB Connector) -> RPi5 -> M.2 HAT w/ PCI-E -> ASM3142 USB PCI-E -> Receiver Pi DDC USB

--or--

(LiFePO4 6.6V -> LinearPi 5V -> UcConditioner 5V @ up to 100A limited by USB Connector) -> RPi5 (StationPi SMT) -> M.2 HAT w/ PCI-E (Separate Power via GPIO or it looks like it uses independent power) -> ASM3142 USB PCI-E -> Receiver Pi DDC USB

Early generations of RPi were notorious for noise with the USB and Network sharing the same Bus. So this PCI-E that has a direct bus to the CPU avoiding noise in the RPi is a most welcome option.

Off Mains RPi with USB PCI-e == nice.

Hopefully, Ian can utilise the power of PCI-E with his HATs one day.
 
#10,499
sbelyo said:
Got it, makes sense now. If you have any of these modules and are not using them, let me know


#35C StationPi SMT
#4B ESS Dual Mono II DAC and I/V board
#1D FifoPiQ7
#19D ReceiverPi DDC
#49B MonitorPi Pro
#50A GPIO extender
#7A Transformer I/V (Bisesik)

Power:

#41C UcPure MkIII x2
#41F UcBalancer KIT x2
Click to expand...

I don't use the DAC modules, but I'll reply if I think of anything this weekend. Something to consider since you are going for RPi-less is if you need a controller to switch inputs. The StationPi Pro not StationPi SMT has a controller, but I think Ian mentioned recently he got the MonitorPi to be a controller.
 
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