Maybe my mpipro is defected? I already write emails to Ian about this problem but he seems not to understand my problem, but I think my video is obvious. And I tell him every detail of the problem. He still does not understand what the problem is... Very strange reaction of him. Maybe I shoud contact Audiophonics instead of him.
I’ll try and upload a video. I don’t think DIY lets you do videos. We need a way to receive FW updates if FW is going to become a feature driver. I think new receiver pi’s have a new port unidentified. Maybe it can be used for FW updates.
Would be nice if a firmware update could solve a problem like mine. But Ian does not tell me any instruction to find out if it's a hardware or software issue.
I linked my YT video some posts above and it works.
I linked my YT video some posts above and it works.
I heard someone not able to upgrade the firmware on a copy. I have bought an Amanero from Italy. He even sent me another board because the first one was defective.
The manual may need a correction. I have used the UcPurePMkIII 3,3v. (you need to jump some part at the back of the board because it is shipped for 5v. by default).
https://github.com/iancanada/Docume...=41C_UcPureMkIII.jpg-,UcPureMkIIIManual,-.pdf
I tested Ian's streamer via a 5V/2.1A battery pack and it works 🙂. But I recommend a 3A+ battery!
RPi4 4GB, PurePi, FiFoPi Q7 with SC-Pure Clocks, HDMI Pro and Ucconditioner 3.3V.
It even seems to me that it sounds better, but before you connect to the battery, be sure to fully charge the PurePi (supercapacitors and batteries for 3.3V).
Someone try it and give your opinion, I think that sounds better than mine iFi IpowerX 5V power supply.
Last edited:
I am wondering what happens if I put Amanero/PridgePi combo onto a Rpi4 and on top of this stack, a FIFO Q7.
As far as I know, both Rpi4 and Amanero/PridgePi use the same GPIO pins to send the I2S music to FIFO Q7.
How can FIFO Q7 decide which one to process?
As far as I know, both Rpi4 and Amanero/PridgePi use the same GPIO pins to send the I2S music to FIFO Q7.
How can FIFO Q7 decide which one to process?
Many Thanks!!! Since I'm an advocate of being completely Off-Mains, at least on the Source Side if other gear is Mains-dependent, this brings great joy. It will help with my Mains allergy if I do pursue this route one day once I'm ready to travel again.
Yes, 3A+ should be minimum in 2023. That's why I'm curious too if the PurePi MKII can scale to 5A+ for the RPi5. Ian mentions feeding 2.5A+ in the manual, so 3A+ scales? But 5A+ should scale too? Since this is for my backup travel rig, RPi4 is perfect but I like to keep options open especially now that scalpers are starting to have an impact.
Ian's hard work has given me options to architect with getting Off Mains w/ convenience. So I'll be forever grateful to Ian I'm not a slave to Mains anymore. It's 2023 after all. More focus should be on low noise floor modulation since Ian has given us the tools to do so. After reading the PurePi MKII manual, the 5V is not in "Pure Mode", but the 3.3V is so not an issue since it's 18650. So with a battery pack, 5V should be considered "Pure Mode" along with the whole PurePi MKII. Leak should be fixed for those with Mains allergies.
- Random RF noise creates noise floor modulation, which degrades SQ
- Random RF noise is very difficult to be fully removed
- Mains has lots of random RF noise
- My Modern DAC has a filter to completely remove switching noise
I planned on a big check-in travel case and implement all my spare Ian parts in there, but if I want to scale down I can consider the PurePi MKII as an option now for carry-on.
Ian has updated the order form:
Last edited:
Does anyone have a recommendation for good LiFePo4 18650 batteries (for the PurePi), it's very hard to find good 3.2V LiFePo4 batteries.
@iancanada do you have any recommendations?
@iancanada do you have any recommendations?
I only recommend Lithiumwerks AKA A123, but I don't know how difficult the shipping will be for a couple of batteries.
https://lithiumwerks.com/products/lithium-ion-18650-cells/
I made a similar recommend here:
https://www.diyaudio.com/community/threads/making-an-ian-canada-streamer.403864/post-7467425
Stortronics is the offical USA store for Lithiumwerks, but you can find these batteries on Vape sites too:
https://stortronics.com/manufacture...-2-ah-lithium-iron-phosphate-lifepo4-battery/
https://www.18650batterystore.com/products/lithiumwerks-apr18650m1b
Last edited:
Appreciate the suggest, but I've been using this for years successfully with Ian's gear:
I can power 5V via GPIO and it has a 3.3V output.
I scale with 26650 not 18650, but I think battery pack + PurePi II optimal.
I use one 26650 in place of the 18650, but I can add 26650 sleds too to scale:
If fact, I changed my Group Buy to include a SC-PURE now that battery pack + PurePi II is an option.
I'm only missing a Clock and a Power Supply to complete my secondary stack. Power Supply can wait.
I wasn't looking forward to building a duplicate UcPure foundation for my secondary stack, so a battery pack + PurePi MKII should work out.
Last edited:
A question about ES9038Q2M Dual Mono II DAC... According to the spec there is +/- 11% matching accuracy between chips - are the channel output levels corrected so they match? Perhaps by "auto level calibration" feature?
11% matching is for output impedance, not for output level. 774 Ohm +/- 11%. It should not be a problem if the input impedance is much higher of the next analogue stage.
Input impedance of IV stage should be as small as possible to switch ESS DAC to current output mode. For example input impedance of OPA861 IV is less than 10 Ohm if I am not mistaken...