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

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#13,382
Just a little heads up for anyone with the Monitor Pi or Monitor Pi Pro. While i was trying to figure out why I had no sound output, I had noticed that my Monitor Pi pro, would pull up the DPLL settings, but I couldn't find any instructions in the manual about what that was or even how to pull it up. So I just went through all three "ESS" controllers Ian has on his website. The instructions for the GUI settings is only in the ESS controller manual. I'm not sure how to access this portion from the front panel, but I know how to do it with an Apple remote. First you press the "up" button, then the "select" button twice, and that will bring up the first settings which are the DPLL settings and the instructions for those settings is in the ESS controller's manual, including the "factory reset" which I stumbled upon, and fixed my no output issue.

Okay, hope that helps. I'm hoping my sync issue maybe by some miracle of chance, in those settings.
 
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#13,383
Hello everyone,

I’m planning to build an audio system using Ian Canada modules and would appreciate your expertise to clarify a few points.

System Requirements​

  • Support USB input or Raspberry Pi playback (USB should work independently without the Pi).
  • Use MonitorPi Pro for input switching.
  • Process signals via FIFO reclocking and output S/PDIF to an external DAC.

Selected Components​

  1. #1D. FifoPi Q7II
  2. #48B. PurePi II
  3. #49B. MonitorPi Pro
  4. #19D. ReceiverPi DDC II
  5. #20C. TransportPi AES
  6. Original Amanero Combo768

Questions​

  1. Raspberry Pi Integration
    • I plan to include a Raspberry Pi 4 in the system, but the connection diagram on the website doesn’t clearly show how to integrate the Pi. How should the Pi be connected to the other modules (e.g., GPIO, I2S)?
  2. Power Supply Configuration
    • Do the ReceiverPi DDC II and TransportPi AES require dedicated power rails from the PurePi II, or can they share a common supply?
  3. FifoPi Q7II Voltage
    • The manual specifies 3.3V for the FifoPi Q7II, but some setup videos show it connected to 5V. Which voltage is correct, and what precautions should I take?
Your insights would be invaluable in avoiding missteps and ensuring optimal performance. Thank you in advance for your time and expertise!
 
#13,384
jameswut2112 said:
How should the Pi be connected
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It's a "HAT, so it's connected to the Pi through the GPIO's. As far as power goes...you need at least two PSU's one for the 5v one for the 3.3v clean power. (It's all labeled and instructions are in the manuals, and they are a big help. I made a folder on my PC and download each manual for each component I have bought or am thinking about buying.)

You can power the stack from #48 PurePi II. It provides both 5v and 3.3. You can also watch the swap meet. I got a couple things there myself and sold a couple things myself. You'll need to buy batteries separately, Ian does sell them, they are not the same as the common 18650, those are 3.7 v. If don't buy from Ian, you make sure the 18650 you get are 3.2/3.3 v.
 
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