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

@weust Yeah, you'll likely need to go through Audiophonics for a return.

Try removing the uConditioner from your 5V chain to the StationPi. Do some critical listening and notice if you hear any noticeable sonic differences. I know that's not the point, but I just removed a 5V uConditioner (because I needed another 3.3V one for a FiFoPi Q3) that I added to my stack. I went straight from a 5V LinearPi to my RPi. I can't hear any noticeable difference in the sound. uConditioners are better used to feed your 3.3V requirements (FiFoPi and DAC), than the RPi. Perhaps my entire system is not 'audiophile' grade resolving as your might be. YMMV. 🙂

The simple reason I have the UcConditioner Pro on that PSU is because I can 🙂
Have them on the other two, figured I put one on this one as well.

Audiophile wise, the streamer will connect to a Holo Audio Spring 3 Level 2 which connects to my Luxman L-590AXII, with Martin Heritage Miles 5 loudspeakers.
 
Just gave it another go. At first the D6 LED doesn't light up, but before it's in conditioning mode it lights up.
And after powering everything off, it will stay lit for a long time.

I will disconnect it, powering directly from the LinearPi to the 5V StationPri Pro input for the RPi directly.
And I will send IanCanada an email to discuss this.
 
Email to Ian send.

I removed the UcConditioner Pro 5V and remove the Slave input for the switch so I could power the LinearPi MkII on it's own, to measure the output.
It's 5.05V. That to me looks just fine, and should not cause an overvolt on the Ultra Capacitors.

Before I try swapping it with the other 5V model, I will await Ian's reaction.
If he responds...
 
Reading the LinearPi MkII manual again, I notice in section F Connectors, for J2 it says the following:
3.3V configuration: AC6V or DC9V
5V configuration: AC6-9V or DC9-12V (AC6V or DC9V when work with UcConditioner)
Both my 5V DC output have a 9V AC input, which would be too high for use in a 5V configuration with a UcConditioner.
So why is this?
Input voltage can be a litter bit high than the above numbers to get more headroom, but have to make
sure that the temperature at heat sink is not exceeding 85ºC.
What is a little bit higher?

The more I read these manuals the more I miss information in them.
 
  • Like
Reactions: redjr and Clausen
IMO, variance.

Non-Pro UcConditioners highly vary depending on the user's soldering and soldering tools (> 80w temp?).

For example, if the job is not done absolutely right, you can run into issues and then rinse and repeat.

There should be zero variance with the Pros. Plus horizontal and vertical mounting.

I prefer selecting my own capacitors, but zero variance would likely override that thought.

Plus, when your weighing to have to procure a whole new >80w soldering tool versus just getting a Pro, Pro is a safe choise unless you need a new > 80w soldering tool for other projects.

I just re-read the UcConditioner 5V manual as it's been years since I thought about the UcConditioner 5V. I just wanted to double-check the solder tool recommend and yep it's >80w:

E. Getting start
Please make sure using solder iron with 80W or higher power for durable connections of this high
current conditioner board.

So one can avoid this "durable connection" hurdle by going with the Pro since I believe the Pro is machine-soldered (pre-assembled).

The soldering points look proprietary and simplified:

layout.png
 
Last edited:
@Pure_mOhms Ok. Thanks. From what I can tell, the Pro takes different ultra caps, that have completely different mounting holes.

The mounting holes look like they are still there. Just added brackets for horizontal.

But the caps look proprietary which is welcome. The Industry Standard is all over the place.

But the Pro is a nice option. I had my eye on some Industry Standard specific super caps which would require the MKII, but the Supply Chain depleted on the old models.

So $110 for the Pro versus $70 for the MKII + $30 for super caps, the price difference is not much considering the MKII takes a lot more care and effort to implement.
 
Reading the LinearPi MkII manual again, I notice in section F Connectors, for J2 it says the following:

Both my 5V DC output have a 9V AC input, which would be too high for use in a 5V configuration with a UcConditioner.
So why is this?

What is a little bit higher?

The more I read these manuals the more I miss information in them.
Hi @weust

I think the manual states the correct input voltage when paired with a UcConditioner; 6 AC, just as you linked to.

I little big higher is probably ~7 volt AC, but 9 V is much higher. This is related to not have a higher temperature at the heat sink of 85 degrees.

Do you have issues with linearPi + UcCond combo that power the Raspberry; high current?
 
Last edited:
@miklau I got a reply back from Ian on the D6.
He says that it should go away after a couple of runs.
But I didn't mention, because I didn't know at that time, that the input on the LinearPi is 9VAC and not 6VAC or a little higher.

But that still doesn't make sense to me as the output from the LinearPi to the UcConditioner Pro input is still 5V DC no matter the LinearPi input.
I will ask him that.

In the hours that ran with the combination I did not see any issue at all.
I ran a tail on a log file (forgot the name because as with everything GNU/Linux isn't sane there either) but didn't see anything mentioned there.
But, I didn't check any further. Should have had a tail on dmesg as well.
moOde Player webGUI didn't show anything as well.

I will ask Ian about the 6VAC combination and why that is.
 
"I'm considering getting the UCPure and have a few questions about the balancing boards. Is it necessary to use the Ian Canada boards, or are the cheaper alternatives on Amazon and AliExpress just as effective? The price difference is significant—I've seen options on Amazon for a third of the price and on AliExpress for even less, though I've never purchased from AliExpress before. I'm curious about what makes the Ian Canada boards worth the extra cost."
 
I have a roblem with fifopiMa or TransportpiAES. After installing, connecting, finding driver and try to listen on external dac i don"t get any spdif signal.
TransportAES has red light on and FidopiMa miss XO light. If i am correct it must be power led, I2s input led, I2s output led, one of xo leds and play led.
All are lightening except XO., On volumio music is playing but no sound from dac. I tried 44 and 48khz music, if maybe one clock has problems but also no light from other xo led.
Any help... what can be the reason that xo is not turning on?
 
@miklau I got a reply back from Ian on the D6.
He says that it should go away after a couple of runs.
But I didn't mention, because I didn't know at that time, that the input on the LinearPi is 9VAC and not 6VAC or a little higher.

But that still doesn't make sense to me as the output from the LinearPi to the UcConditioner Pro input is still 5V DC no matter the LinearPi input.
I will ask him that.

In the hours that ran with the combination I did not see any issue at all.
I ran a tail on a log file (forgot the name because as with everything GNU/Linux isn't sane there either) but didn't see anything mentioned there.
But, I didn't check any further. Should have had a tail on dmesg as well.
moOde Player webGUI didn't show anything as well.

I will ask Ian about the 6VAC combination and why that is.
Glad you got a reply from Ian and lets hope that solve your problem🙂

I agree with you regarding the input voltage. That should not effect the output unless the heat sink is getting too hot and the output therefor is not 5v, because the regulator can't regulate properly or shuts down due to the excess heat.
I have been running the LinearPI with the UcConditioner mkii at both 9v and 6v ac input without any issue. I had a heat sink that got very hot and therefor switched down to the lower 6v AC input. Again this should not relate to UcCond...
 
(not being able to quote for 30 or so minutes after a post is very annoying here)

@miklau And especially since the other combination (the 5V DC for the FifoPi Q7) doesn't have this issue that makes me even more curious.
I get what you say about heat. I put my finger on the heatsink of the LinearPi powering the RPi without UcConditioner Pro, and it will cool.
It hadn't been running for hours, not even close, but if the 9V AC could have been an issue I should have felt something.

So, hopefully Ian will reply again.
Also asked about the D3 and D6 and how the system behind it work and why either would light up in which case.
 
  • Like
Reactions: miklau
I have a roblem with fifopiMa or TransportpiAES. After installing, connecting, finding driver and try to listen on external dac i don"t get any spdif signal.
TransportAES has red light on and FidopiMa miss XO light. If i am correct it must be power led, I2s input led, I2s output led, one of xo leds and play led.
All are lightening except XO., On volumio music is playing but no sound from dac. I tried 44 and 48khz music, if maybe one clock has problems but also no light from other xo led.
Any help... what can be the reason that xo is not turning on?
can you send some pictures?
 
Hi Team, need advise....
on a RPi5 + DDC with USB + Q7 + AES + Dual Mono II + OPA861 stack, what could be the reason when only DDC RCA input option is not producing sound? rest all input sources are working. so power and other areas seems good.
Can't suspect AES card as the same AES as part of only streaming stack was working perfectly.
when DDC RCA is connected from AES. and the Q7 is doing re clocking for both AES and DAC card using MCLK connectors, the DDC RCA input selection is not giving any sound output. no indication of playing as well....
Could you please advise if we need to look for specific area or settings.... Thanks in advance.
 
I have a roblem with fifopiMa or TransportpiAES. After installing, connecting, finding driver and try to listen on external dac i don"t get any spdif signal.
TransportAES has red light on and FidopiMa miss XO light. If i am correct it must be power led, I2s input led, I2s output led, one of xo leds and play led.
All are lightening except XO., On volumio music is playing but no sound from dac. I tried 44 and 48khz music, if maybe one clock has problems but also no light from other xo led.
Any help... what can be the reason that xo is not turning on?
what software do you use?