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Filter brewing for the Soekris R2R
Filter brewing for the Soekris R2R
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Old 18th April 2019, 10:27 AM   #1751
analog_sa is online now analog_sa  Europe
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Filter brewing for the Soekris R2R
Is there any discussion/explanation on what the DC filter does and in what way it is audible? I must have missed this.
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Old 8th May 2019, 04:16 PM   #1752
Nanekiu is offline Nanekiu  Norway
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How does the DSD decimation filter actully work, at what rate does it decimate the DSD stream, is it to 8x 44/48khz, or does it decimate to 2.8/3.1mhz.
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Old 8th May 2019, 08:46 PM   #1753
SebastianL is offline SebastianL  Denmark
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Originally Posted by SebastianL View Post
@TNT: Johan could you please upload the latest filter pack including your great filter in F4, but with the DC Blocking ACTIVATED? If I had the txt file I could change it myself and compile a skr file, but I understand you're not willing to publicize the txt file atm.

I'm asking this favour because lately my amp has been blowing fuses and popping tubes and I'd like to be on the safe side.
Sadly my amp has been popping a few more output tubes and blowing fuses even with the DC blocking in place. So now I'm certain it's caused by a pack of bad EL34 tubes (by German TAD) with no more than 200 hours on them. Good quality tubes are hard to come by these days.
I'm concluding that omitting the DC blocking is doing no harm, at least in my system.
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Old 9th May 2019, 08:36 AM   #1754
Pigeatgarlic is offline Pigeatgarlic  Viet Nam
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Hi all,
Now we living in 2019 and can you tell me which power supply is the most complete/best for the soekris board and rasberry pi3+ ian’reclocker i2s combo, i know this power supply dont need too much power but must have lowest dítortion. Thus, in theoretical, battery do well with low cost, why nobody use it
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Old 9th May 2019, 03:59 PM   #1755
Nanekiu is offline Nanekiu  Norway
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OK so i found the answer to my own question regarding the DSD decimation, someone said that it decimates to 352/384khz rates and FIR2 upsamples it to 2.8/3.1mhz again.


Soekris just wondering but is it technically possible to decimate the DSD128/256 stream directly to FIR2 rates, i'm curious if that will have a effect on SQ.
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Old 9th May 2019, 07:02 PM   #1756
Nanekiu is offline Nanekiu  Norway
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@TNT can you please upload your Filter with 1015_Kb16_BW replacing C128dp, I'm really liking the sound of that filter.



I've attached the text file but i think gain needs to be changed for it to not clip with 1.19+ firmware.




Quote:
Originally Posted by Pigeatgarlic View Post
Hi all,
Now we living in 2019 and can you tell me which power supply is the most complete/best for the soekris board and rasberry pi3+ ian’reclocker i2s combo, i know this power supply dont need too much power but must have lowest dítortion. Thus, in theoretical, battery do well with low cost, why nobody use it

The salas 1.3 Group buy found on diyaudio would be a very good place to start for a psu.
Attached Files
File Type: txt 1021filt_1015_Kb16_BW.txt (105.0 KB, 27 views)

Last edited by Nanekiu; 9th May 2019 at 07:06 PM.
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Old 11th May 2019, 08:01 AM   #1757
TNT is offline TNT  Sweden
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Location: Sweden
Sorry but there are som many variants that could be made so I will not start on that rocky road. It is a direct contender at 44,1 so I think one should be able to make a permanent choice.

//
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More distortion to the people!
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Old 12th May 2019, 06:40 PM   #1758
Arunas B is offline Arunas B  Lithuania
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Quote:
Originally Posted by Pigeatgarlic View Post
Hi all,
Now we living in 2019 and can you tell me which power supply is the most complete/best for the soekris board and rasberry pi3+ ian’reclocker i2s combo, i know this power supply dont need too much power but must have lowest dítortion. Thus, in theoretical, battery do well with low cost, why nobody use it
I use two 12v batterys with no problem. 7ah on negative rail and 9ah on positive it give good 3days without charge.
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Old 22nd May 2019, 03:33 PM   #1759
Lawrenceho is offline Lawrenceho  Hong Kong
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Join Date: Jul 2018
Hi all,


Do we have a NOS filter that works with DAM1021 firmware 1.06?



I am aware that one can modify the stock F6 (minimum) filter using tools provided by Soren. However, all NOS filters I found are in .skr not .txt.


Any help would be much appreciated!


Lawrence
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Old 27th May 2019, 03:34 AM   #1760
Nanekiu is offline Nanekiu  Norway
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Join Date: Sep 2016
Quote:
Originally Posted by Lawrenceho View Post
Hi all,


Do we have a NOS filter that works with DAM1021 firmware 1.06?



I am aware that one can modify the stock F6 (minimum) filter using tools provided by Soren. However, all NOS filters I found are in .skr not .txt.


Any help would be much appreciated!


Lawrence
There's a nos filter in page 170 in the filter pack listed there.



BTW has anyone compared which FIR2 filters sounds the best?
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