ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi - Page 2

soundcheck · 28th January 2017, 04:30 PM

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.

sckramer · 01:11 AM

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!

lykkedk · 4th February 2017, 06:06 PM

Subscribed...

'loving the PI as headless musicsource

Jesper.

BryceJ · 17th February 2017, 09:13 PM

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.

SomekPoland · 21st April 2017, 09:48 AM

I would say, that some rechecking may be a good idea, don't we all agree, that RPi generated I2S isn't too good?

Dimdim · 21st April 2017, 10:22 AM

Knowing Ian, he's probably planning on running the 9018K2M in master mode..

iancanada · 21st April 2017, 02:45 PM

Quote:

Originally Posted by SomekPoland

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

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

Eldam · 07:13 PM

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 ?

yoke · 27th April 2017, 08:33 PM

Subscribed

Tomax · 15th May 2017, 02:08 PM

Hi Ian,

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

28th January 2017, 04:30 PM	#11
soundcheck diyAudio Member Join Date: Mar 2005 Location: DUS	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. __________________ ::: my audioblog - latest series: RaspBerry PI - "The Audio Engine" :::

30th January 2017, 01:08 AM	#12
sckramer diyAudio Member Join Date: Nov 2010	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! __________________ Scott Last edited by sckramer; 30th January 2017 at 01:11 AM.

4th February 2017, 06:06 PM	#13
lykkedk diyAudio Member Join Date: Dec 2002 Location: Denmark, Fredericia	Subscribed... 'loving the PI as headless musicsource Jesper. __________________ DCG3 Dual DCSTB, AK4490 Dual SuperDAC AlephJ Mimi! http://www.diyaudio.com/forums/pass-...mimi-mini.html

21st April 2017, 10:22 AM	#16
Dimdim diyAudio Member Join Date: Sep 2008 Location: Athens	Knowing Ian, he's probably planning on running the 9018K2M in master mode.. __________________ http://www.dimdim.gr

27th April 2017, 07:10 PM	#18
Eldam Banned Join Date: Sep 2012 Location: France	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 07:13 PM.


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

17th February 2017, 09:13 PM	#14
BryceJ diyAudio Member Join Date: Jul 2013 Location: Vancouver, BC	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.

21st April 2017, 09:48 AM	#15
SomekPoland diyAudio Member Join Date: Mar 2011	I would say, that some rechecking may be a good idea, don't we all agree, that RPi generated I2S isn't too good?

27th April 2017, 08:33 PM	#19
yoke diyAudio Member Join Date: Jan 2004 Location: Split	Subscribed

15th May 2017, 02:08 PM	#20
Tomax diyAudio Member Join Date: Apr 2016	Hi Ian, anything new on this topic or did you discard your plans building this HAT DAC?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
I/V stage for ES9028Q2M	gandolf	Digital Line Level	25	9th February 2018 07:04 AM
ES9028Q2M balanced output	evert1	Digital Line Level	0	26th December 2017 02:30 PM
ES9018K2M: best (Raspberry)-OS/384 khz + dtoverlay	sfb2	PC Based	2	30th May 2017 10:43 PM
Hats off to Mr Pass, encouragement to new members	Russellc	Pass Labs	10	17th May 2015 09:23 AM
Hats make better bass?	xstephanx	Subwoofers	11	9th February 2005 11:59 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read