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Old 22nd July 2018, 05:06 AM   #981
mcluxun is offline mcluxun  United States
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Join Date: Nov 2010
Heat problem almost solved.
Now fiddling with the relay to get mute pin working proper.
Here's some plots from picoscope: one is the 7k square wave from dac board. another is the same wave after output board.
Attached Images
File Type: png 7k square dac.png (29.1 KB, 459 views)
File Type: png 7k square output.png (19.3 KB, 439 views)
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Old 22nd July 2018, 08:51 AM   #982
ppy is offline ppy  Russian Federation
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Here are my measured 7K
File -3db 7K created Audition.
Playback via AsioProxy in DSD256.
Chinese transformer 10K:10K????????? ???????? ???????-???
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File Type: png SDS00001.png (19.3 KB, 423 views)
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Old 23rd July 2018, 12:25 AM   #983
mcluxun is offline mcluxun  United States
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Quote:
Originally Posted by ppy View Post
Here are my measured 7K
File -3db 7K created Audition.
Playback via AsioProxy in DSD256.
Chinese transformer 10K:10K????????? ???????? ???????-???
Correction: here's 7k square wave with 10k load.
LL1527XL transformer. 3.3K R65
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File Type: png 7k-square-loaded.png (36.3 KB, 393 views)
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Old 23rd July 2018, 04:44 PM   #984
barrows is offline barrows
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Default Filter for oversampling?

Quote:
Originally Posted by mcluxun View Post
Correction: here's 7k square wave with 10k load.
LL1527XL transformer. 3.3K R65
Is this with a minimum phase or partial minimum phase filter?
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Old 23rd July 2018, 05:04 PM   #985
mcluxun is offline mcluxun  United States
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Quote:
Originally Posted by barrows View Post
Is this with a minimum phase or partial minimum phase filter?
HQPlayer poly-sinc, DSD5v2 256+fs, DSD256.
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Old 31st July 2018, 12:44 AM   #986
mcluxun is offline mcluxun  United States
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Ki-CAD file:

GitHub - lkong/dsc2-header: u.fl dsc2 header with isolator


OSHPark:
OSH Park ~


Promised header with isolator
Attached Images
File Type: jpg IMG_20180730_173532233_HDR.jpg (466.8 KB, 262 views)
File Type: jpg IMG_20180730_173543328_HDR.jpg (468.3 KB, 131 views)
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Old 31st July 2018, 03:22 AM   #987
chientechnical is offline chientechnical  Viet Nam
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Quote:
Originally Posted by mcluxun View Post
Ki-CAD file:

GitHub - lkong/dsc2-header: u.fl dsc2 header with isolator


OSHPark:
OSH Park ~


Promised header with isolator
I using ISO7640 as suggest of Amanero to isolator too. Do you need to reclock after the Isolator?
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Old 31st July 2018, 04:05 AM   #988
mcluxun is offline mcluxun  United States
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Quote:
Originally Posted by chientechnical View Post
I using ISO7640 as suggest of Amanero to isolator too. Do you need to reclock after the Isolator?
I'm not using the isolator for i2s signals.
There are for DSD_ON and MUTE.
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Old 31st July 2018, 09:11 PM   #989
Fabrizio72 is offline Fabrizio72  Italy
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On the following link:
AK4137 I2S/DSD Sample Rate Conversion Board Supports PCM/DSD Interconversion DOP | eBay
A "new" AK4137 board is offered for 34 usd.
Instead of the other board (having Amanero input) this seems to have I2S input.

I understood that AK4137 doesn't allow top quality conversion, but do You think this board can be of some value for DSC2 ? For example odroid (or RPi3) to DSD through i2s without usb?
What's about "pops" at the starting session or between songs?

This can be a simple and cheap system to start listening...

Fab
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Old 2nd August 2018, 10:06 PM   #990
barrows is offline barrows
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Default Thanks!

Quote:
Originally Posted by mcluxun View Post
Ki-CAD file:

GitHub - lkong/dsc2-header: u.fl dsc2 header with isolator


OSHPark:
OSH Park ~


Promised header with isolator
For your work on this. I will certainly be trying it when i get the time! Are you experiencing quiet switching and starting stopping of playback etc, with no annoying pops, etc?
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