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Filter brewing for the Soekris R2R
Filter brewing for the Soekris R2R
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Old 27th May 2019, 04:23 PM   #1761
Nanekiu is offline Nanekiu  Norway
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Oh just saw it's for 1.06 your looking for, my bad was late at night, and did not notice that
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Old 27th May 2019, 04:37 PM   #1762
Lawrenceho is offline Lawrenceho  Hong Kong
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Quote:
Originally Posted by Nanekiu View Post
Oh just saw it's for 1.06 your looking for, my bad was late at night, and did not notice that
Actually I had my unit updated to v1.21 just a day before your reply, so your info does help! Now it is running well with NOS filter. No complaint so far.

For those who is in search of filters for v1.06, I also found it on page 136 posted by Oneclock.
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Old 27th May 2019, 06:27 PM   #1763
analog_sa is offline analog_sa  Europe
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Filter brewing for the Soekris R2R
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Originally Posted by Lawrenceho View Post
No complaint so far.
Not even a tiny bit of clipping? Or have you reduced volume?
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Old 28th May 2019, 05:35 PM   #1764
Nanekiu is offline Nanekiu  Norway
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Hmm in my case i needed to change bypass filters back to 0.8 multiplier gain, as i externally upsample, and it sounded kind of weird with less width in the soundstage using 0.9999995 multiplier with the dac set to 0db, maybe it was softly clipping somewhere but 0.8 fixed it for me.
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Old 28th May 2019, 08:09 PM   #1765
analog_sa is offline analog_sa  Europe
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Filter brewing for the Soekris R2R
0.8 sounds about right
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Old 29th May 2019, 01:02 AM   #1766
Lawrenceho is offline Lawrenceho  Hong Kong
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Originally Posted by analog_sa View Post
Not even a tiny bit of clipping? Or have you reduced volume?
I set filter as F7 which is supposedly NOS. Listened to one or two songs, sounded alright.

I am very new to this digital filter thing, my interpretation of “clipping” is sharp cut-off at certain frequencies. If this is the case, then I will need to listen to it again and pay more attention this time.
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Old 29th May 2019, 07:18 AM   #1767
analog_sa is offline analog_sa  Europe
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Filter brewing for the Soekris R2R
Stated, perhaps in a different thread, was that from firmware ver 1.19 onward the gain was raised by 2db iirc. All the new filters have a correspondingly lower gain, but the older filters cause clipping in program material recorded close to 0db.
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Old 10th June 2019, 08:19 AM   #1768
Newk_Yuler is offline Newk_Yuler  United States
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Commenting to leave a mark. I spent the last couple of weeks reading this thread while I wait for a 1541 to arrive past grabbing one backordered from the spring sale.

I throw my deepest gratitude to the filter contributors. You know who you are (and who you will be). I'll watch for advancements as long as my Soekris DAC functions. I expect it to be an end-game DAC for the time being. At least until something truly significant comes along that I'm certain can justify investing in a move forward.

I've obtained a recommended USB-to-TTL cable and dimming film to cover the overly bright displays. I'm anxious to get TNT's latest comp running, so the preloaded filters probably won't last long. (Sorry, Soren. You apparently need to up your game as far as filter design goes. No offense.) I likely won't be trying to mod the hardware, although I am capable and I haven't yet looked into the other DIY threads. So, we'll see.

I must say, any of you who haven't read this whole thread owe it to yourself and the contributors to take the time even if you aren't capable of understanding the technical specifics. You'll get a better sense of what's involved and a greater appreciation for the guys who worked the math. When Paul disappeared into the ether there began a feeling of significant loss. Like the passing of a friendly acquaintance who had an extraordinary existence contributing to the good of society. ...It would be nice to know he's doing well these days even if he couldn't be persuaded to come back into the community. I have to wonder what made him decide to close his blog.

Again THANK YOU to the contributors.

Back to lurking, watching, and waiting.
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Old 10th June 2019, 01:00 PM   #1769
Nanekiu is offline Nanekiu  Norway
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@TNT if I may make a suggestion regarding FIR2 filter, I think a high stop band attentuation one around -170db will be ideal, something like the EQHQ FIR2 but with double the taps.
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Old 10th June 2019, 01:07 PM   #1770
TNT is offline TNT  Sweden
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I tried to make a new FIR2 but i failed to make a better sounding one then what exists. The no of taps set aside for FIR2 is very low. Have to try again maybe...

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