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

[MtlJazz]

@LongLong00 Plenty of options here: https://iancanada.ca/collections/project

 

[gizmo3]

aluminum strips are ready and around it.
maybe shield the transformers once, it's fine for now.

 

[RoyA]

The 3v setting is for 15v power supplies

for 3.3v and 5v ultra capacitor power packs 2.7v is the right setting for UcBalancer.

When you are making up a 15v ultra capacitor power packs you need to have the UcBalancers set to 3V

Thanks for confirming what

 

[Philip Kent]

@Philip Kent
I would double check all your solder joints for cold solder joints. They should be smooth and shiny not a dull silver ball.

Thanks for the advice and for taking the time to respond. I’ll do that and report back.

 

[MMtt1234]

Hello I would like to operate my Denafrips Pontus 2 via the I2S interface with a streamer IAN Canada? Which parts are needed ? A clock is not needed?

#48B. PurePi II 5V+3.3V ultracapacitor/LifePO4​

#17B. HdmiPi Pro II Flagship HDMI transport interface​

????

https://iancanada.ca/products/3-2v-lifepo4-battery-cells
https://iancanada.ca/products/1d-fi...h-isolator-re-clocker-and-low-phase-noise-xos
https://iancanada.ca/products/49b-monitorpi-pro-integrated-control-center-and-signal-analyzer

if you use the flagship HDMI board, you should also use the Q7
I would also recommenbd the MonitorPiPro for Q7 configuration and debugging

 

[weust]

Audiophonics doesn't sell 25mm long standoffs yet, and the documentation (of the UcConditioner) doesn't mention them at all, not the M size.
Are they M2.5 or M3?
The product page on Ian Canada's shop site mention to get the standoffs, but that page doesn't mention the size as well, only length.

 

[Spacejack]

M2.5

 

[weust]

Thanks.

 

[ljufa]

Hello,
I just want to share my experience in the case that someone else has the same situation.
So setup is: RPI4 -> FifoPiMa -> AK4497
With default PCM setting of dac 32bit MSB justified I could not get sound over 88.2K sample rate.
while with 16/24bit I2S compatible mode (DIF[2:0]=011) it plays all formats up to 384K.

Configured dtlayer is hifiberry-dacplus

 

[miklau]

Hi @pkonstantinidis

Just trying to remember your setup, but did you not use a 9v AC supply for your linearPi+UcCon. combo configured in 5V?

This voltage would easy my build because I then could use a single transformer, so just asking. Ian actually recommend 6v AC in the troubleshooting blog at his website.

@SimonJ Was it not you that have this experience regarding the use of 6v instead of 9v due to a blown fuse?

Anybody else had issues with blown fuses used with the 9v AC input?

Regards Mikkel

 

[zabloc]

Anybody else had issues with blown fuses used with the 9v AC input?

Hi,

nope, 9V AC it works ok,
I have several LinearPi old and new MK2, and they have always worked on 9V with UcConditioners, never had a fuse blow.

 

[Spacejack]

I had an issue with a fuse blowing when the voltage was above 6V. The fuse would blow at the end of charging UcCond, and just after it turned the "conditioning" LED ON. Interestingly I have several such setups and the one that was generating the problem was LinearPi v1. The rest are LinearPi II and same as zabloc - no problem for several months.

 

[sbelyo]

I have a question that hopefully someone can answer. How much current at @5V can a UcPureMkII provide?

 

[qwertyl]

According to the manual UcPure is "capable of delivering up to 1000A dynamic current"

 

[sbelyo]

I thought that was just theoretical draw from the super capacitors. I can't see how that board could survive past 5 amps. I only want to draw 500 ma at 5V. I just need to figure out if it's only to draw that

 

[qwertyl]

I can't see why not, but drawing 0.5A will discharge the supercapacitors in maybe 20-30 minutes. I am sure somebody can calculate this better than me...

 

[sbelyo]

yeah, thats the calculation I'm looking for. It may be far less that 500 ma `but I have to measure it real time. I can always use the LinearPi MkII but I thought I would see if I can use the UCPure

 

[pkonstantinidis]

Hi @pkonstantinidis

Just trying to remember your setup, but did you not use a 9v AC supply for your linearPi+UcCon. combo configured in 5V?

This voltage would easy my build because I then could use a single transformer, so just asking. Ian actually recommend 6v AC in the troubleshooting blog at his website.

@SimonJ Was it not you that have this experience regarding the use of 6v instead of 9v due to a blown fuse?

Anybody else had issues with blown fuses used with the 9v AC input?

Regards Mikkel

I have used an AC transformer with 3 secondary outputs at 9V each (max 2.5A). Two secondaries power two LinearPi boards and the third secondary drives the Salas L-adapter.
I hope I have clarified how my setup is.

 

[gizmo3]

5v 3,3v PurePi 1, isolatorPI II and FifoPi Ma.

according to the manual, the isolator must be in master mode, the FifoPi Ma jumpers (on) J4 1-2 and 3-4 to share Paspberry Pi power, in this way the isolator II does not need to have power on J1 5/6 volts.

is it possible to supply the isolator II with 5 volts J1 (or 3.3v) by not connecting the jumpers J4 1-2 and 3-4 of the FifoPi Ma?

ps, I also use the 3.3v clean side FifoPi Ma.

 

[SimonJ]

Hi @pkonstantinidis

Just trying to remember your setup, but did you not use a 9v AC supply for your linearPi+UcCon. combo configured in 5V?

This voltage would easy my build because I then could use a single transformer, so just asking. Ian actually recommend 6v AC in the troubleshooting blog at his website.

@SimonJ Was it not you that have this experience regarding the use of 6v instead of 9v due to a blown fuse?

Anybody else had issues with blown fuses used with the 9v AC input?

Regards Mikkel

My issue was with UCpure where the transformer voltage was too high and in the end damaged the UcPure