0

Adding external I2S ADC to Beocreate 4CA

Truffles

May 02, 2023 12:40

None

Follow

Hi, I’m currently using Beocreate, but I want to add an ADC in order to listen to my vinyls. So I ordered an ADC module which has I2S output and connected it to the according pins on the extension connector (P3) - DSP MCLK - ADC MCLK DSP BCLK OUT2 - ADC BCLK DSP LRCLK OUT2 - ADC LRCLK DSP SDATA IN2 - ADC SDATA My understanding is that this way I have connected directly to the DSP and should be able to do the RIAA equilization inside the DSP. On the other hand I would like to have the ADC as analog only input. My questions are: 1. Can I add an analog input in “Sources”? If yes - how? 2. Can I add an option to trigger the RIAA EQ in the “Analog input”? Excuse me, if my questions sound a bit lame. I am fairly new to the topic. Kind Regards :)

• Facebook
• Twitter
• LinkedIn

3 comments

• 0
  
  HiFiBerry team May 02, 2023 21:35

  It's way more complex then this. You would need to create your own DSP program with the correct settings for this card, route the input via the ASRC and add it somewhere to to signal flow. This isn't a trivial thing and depending on how the ADC you connect works, it might not work at all. I2S is a complex interface. Juts connecting the right pins won't do the job. 
  
  We have written a small blog article about this:
  https://www.hifiberry.com/blog/techtalk-i2s-i2s/
  
  This doesn't even take the DSP into account which adds even more complexitiy.

• 0
  
  Truffles May 02, 2023 22:46

  Hi, thank you for the response. I’m aware of the DSP programming, however I don’t understand how the interface can be edited in order to select the inputs. Mostly I don’t have issues working with Sigma Studio. I’m currently using the “2-way-eq” project that is given in the documentation as an example. I guess I routed the signals correctly, just need to know how the UI can be edited to add a option to select Analog input as it is the case with Optical input.

  Thanks!

• 0
  
  HiFiBerry team May 03, 2023 11:11

  You would have to create your own extension for the Beocreate UI, There is no such functionality today.