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ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
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Old 28th January 2017, 03:30 PM   #11
soundcheck is offline soundcheck  Germany
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Don't forget the I2S reclocker/filter/isolator!!

I don't see these features showing up in your block diagram.

Good luck with your project.
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Old 30th January 2017, 12:08 AM   #12
sckramer is offline sckramer  United States
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Gotta play devil's advocate... why? An off the shelf dac chip? With your talent-- could write a Dac/Filter in an FPGA.

How about FIFO III & pi FIFO II ;P

And that awesome pi isolator??? The GB list is getting long!
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Last edited by sckramer; 30th January 2017 at 12:11 AM.
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Old 4th February 2017, 05:06 PM   #13
lykkedk is offline lykkedk  Denmark
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'loving the PI as headless musicsource

Jesper.
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Old 17th February 2017, 08:13 PM   #14
BryceJ is offline BryceJ  Canada
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Ian, are you going to implement the hardware volume control in this DAC?

I assume that this is the same as the 9023 chips and that it must be done through software and the I2C connection.
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Old 21st April 2017, 08:48 AM   #15
SomekPoland is offline SomekPoland  Poland
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I would say, that some rechecking may be a good idea, don't we all agree, that RPi generated I2S isn't too good?
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Old 21st April 2017, 09:22 AM   #16
Dimdim is offline Dimdim  Greece
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ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
Knowing Ian, he's probably planning on running the 9018K2M in master mode..
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Old 21st April 2017, 01:45 PM   #17
iancanada is offline iancanada  Canada
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ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
Quote:
Originally Posted by SomekPoland View Post
I would say, that some rechecking may be a good idea, don't we all agree, that RPi generated I2S isn't too good?
Quote:
Originally Posted by Dimdim View Post
Knowing Ian, he's probably planning on running the 9018K2M in master mode..
The highlighted part of this DAC would be playing both DSD and I2S on top of RPi.

However, everybody knows the issue of RPi, the signal quality...

Yes, to achieve higher sound quality, we have to run it in master mode. A FIFO or a master mode re-clocker will be required in this case.

I'm gonna design a FifoPi with built-in DSD decoder for it. I hope I can start very soon ...

Ian
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Old 27th April 2017, 06:10 PM   #18
Eldam is offline Eldam  France
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Hi Ian,

You finally never told us if you were hearing a difference with the I2S output of an Odroid C1+ vs a Pi3 as you have both ?

And ultimatly if a difference occurs (at ears) despite the Fifo+isolator+reclocker ?

Does it no make sense to deal with ESS9038 or AK chip ?

on this project : no sota ESS electrical voltage reference chip and sota ldo reg ?? NDK or similar very near of the dac chip, to stay cost low ??? Many Pi dac hats are existing already, what is the plus ?

Last edited by Eldam; 27th April 2017 at 06:13 PM.
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Old 27th April 2017, 07:33 PM   #19
yoke is offline yoke  Croatia
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Old 15th May 2017, 01:08 PM   #20
Tomax is offline Tomax
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Hi Ian,

anything new on this topic or did you discard your plans building this HAT DAC?
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