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Beocreate 4 Ch-Amp with analogue Input

Lu Greco

February 10, 2020 18:30

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hi @ all,

is the add-on analoge in/output-boad also designed to add to your 4-ch-amp?

or can i just use the analoge 1/2 or 3/4 on the borad by welding some pins?

 

If yes, how is the pin matrix?

 

Thanks

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7 comments

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  HiFiBerry team February 11, 2020 06:57

  Hi,

  There is no analogue input on the Beocreate, only outputs. While the DAC/ADC add-on board might work on the Beocreate, it's not a simple thing to implement this. We never tried it by ourselves, but it will need at least an individual DSP profile. I would only recommend to experiment with this for very experienced users.

  Best regards,
  Daniel

   

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  Kidon Sull October 23, 2020 05:34

  I also have been wondering what those Analog 1/2, and 3/4 are for. Is there any way to implement 'op amp' stage between PCM4104 and TPA3128 ?! I noticed that ClassD generally works fine for legacy speakers, but tends to be a bit tiring for new, modern speakers while listening long hours.

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  HiFiBerry team October 23, 2020 05:47

  These are differential DAC outputs. They are there for debugging purposes. While theoretically you could implement your own buffer end power stage from there, I don't think this makes much sense as you're basically throwing away most of the Beocreate's hardware.
  
  Did you listen to the Beocreate? If something is "tiring", you can easily adjust the sound profile in a way that works better for you by adding filters.

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  Kidon Sull October 23, 2020 10:40

  Thanks for prompt answer ! Yes, I do listen to Beo, and TPA3255 amp with BB opas(2134), side by side, with Elac Debut 6.2 speakers. But I tend to listen to 3255 more and longer, hence the question above. I find it's a bit daunting to add my own filters, and actually haven't tried it yet, other than the easy 'Listening mode' menu which doesn't suffice my needs... I'd highly appreciate if you could point me to some example or tutorial docs which I can refer to. 

  Cheers,

   

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  HiFiBerry team October 23, 2020 10:44

  Just experiment with parametric equalizers >10kHz. Try reducing it a bit, your other amplifier might damp these frequencies a bit. 

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  Kidon Sull October 24, 2020 01:50

  Wow, I think you knew exactly what I mean and gave me a pertinent prescription !

  I'm experimenting with 9~11kHz, - 1~3dB range and begin to hear the effect, which surprisingly approaches my ears' satisfaction !! 

  I think I'll have to give it a few trials to find my sweet spot, and forget about opas for the time being.

  Many many thanks for your valuable advise.  

   

  Cheers,

  Edited by Kidon Sull October 24, 2020 06:22
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  Heinrich Meier October 24, 2020 19:08

  Hello HiFiBerry team,

  I am very interested to use one of this outputs. Can you please share a documentation of the pin configuration.

  Thank you,

  Heinrich