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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
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Old 8th November 2018, 04:33 PM   #7731
maikel76 is offline maikel76  Thailand
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Location: BKK
Quote:
Originally Posted by living sounds View Post
You mean J3, right? Why would it be easier?
In my case I couldn’t get J10 serial to work but I could get isolated serial on J3 to work.
That was just my experience, what Randy said makes sense too.
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Old 8th November 2018, 07:23 PM   #7732
Greg Stewart is offline Greg Stewart  United States
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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
I vaguely remember the isolated serial connection is TTL level and requires a 3.3V signal level, but the non-isolated one works with 5V (not sure if it also works at 3.3V).

I haven't connected to mine via serial for 2 years or so, but I do remember I have 2 USB-Serial adapters, one with a TTL (3.3V) level that I use when connecting via the isolated connection and the other with a 5V level for the regular connection.

AND I found, like Randy, that the non-isolated one was a little easier to get a connection on, but both worked when using the appropriate level output.

See HiFiDuino, this post, for some of the info... the rest is as I remember in this main thread many posts ago:

The Soekris R-2R DAC: Technical Details | H i F i D U I N O

Search for 'serial'.

Greg in Mississippi
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Old 9th November 2018, 01:23 AM   #7733
maikel76 is offline maikel76  Thailand
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Quote:
Originally Posted by Greg Stewart View Post
I vaguely remember the isolated serial connection is TTL level and requires a 3.3V signal level, but the non-isolated one works with 5V (not sure if it also works at 3.3V).



I haven't connected to mine via serial for 2 years or so, but I do remember I have 2 USB-Serial adapters, one with a TTL (3.3V) level that I use when connecting via the isolated connection and the other with a 5V level for the regular connection.



AND I found, like Randy, that the non-isolated one was a little easier to get a connection on, but both worked when using the appropriate level output.



See HiFiDuino, this post, for some of the info... the rest is as I remember in this main thread many posts ago:



The Soekris R-2R DAC: Technical Details | H i F i D U I N O



Search for 'serial'.



Greg in Mississippi
Aah thanks Greg, that totally makes sense. I connected my ISO serial to a raspberry pi, which indeed uses TTL level.
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Old 10th November 2018, 02:35 PM   #7734
henrylarsen is offline henrylarsen  Denmark
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Join Date: Nov 2011
Default DSP and two DAM 1021

I have until now used one dam1021 followed by an electronic crossover. I have however been intrigued by trying two dam2021 with a Minidsp Nanosharc. It works flawlessly. I have not had time yet to check out the sound quality, but I have high expectations, also now having the option to easily play with different filter options.
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Last edited by henrylarsen; 10th November 2018 at 02:57 PM.
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Old 11th November 2018, 11:40 AM   #7735
hop.sing is offline hop.sing  Europe
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Quote:
Originally Posted by soekris View Post
I have some new dam1021 firmware for testing, it hopefully should fix the issue some are seeing with small "clicks" on rev 1.19, I can't be certain as only some have issues and my prototypes here don't....

For now it's just the fpga firmware for testing, just down and install as normal, firmware 1.19 must already be loaded, if not install firmware 1.19 first.

http://soekris.dk/download/dam1021/1021fpga_120.skr

Please let me know how it goes asap.
Hi Soren
i just installed the update on a v3 board and unfortunately it did not solve the issue with the clicks. The clicks are on the toslink connection as well as on the i2s line from the raspberry.
Going back to 1.06 solves the issue.
Best Tobias
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Old 11th November 2018, 02:49 PM   #7736
living sounds is offline living sounds  Germany
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Hi Soren,

is there any news regarding a possible ADC based on a SAR chip?
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Old 11th November 2018, 09:12 PM   #7737
soekris is offline soekris  Denmark
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Join Date: Jun 2009
Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
Quote:
Originally Posted by hop.sing View Post
Hi Soren
i just installed the update on a v3 board and unfortunately it did not solve the issue with the clicks. The clicks are on the toslink connection as well as on the i2s line from the raspberry.
Going back to 1.06 solves the issue.
Best Tobias
Thanks for the feedback, I'll continue the work on fixing it.
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Old 11th November 2018, 09:15 PM   #7738
soekris is offline soekris  Denmark
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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
Just for info, we have added an US online reseller, I know many of you have been waiting on that, they will carry the whole lines of dams and dacs.... Please visit them at:

https://www.modhouseaudio.com/
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Old Yesterday, 10:18 PM   #7739
bmxmen is offline bmxmen
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Hi Soren i have an information that we will have on dsp on dam1021, it will be some think like parametric equalizer? It is pasible to do it ?
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Old Yesterday, 10:22 PM   #7740
soekris is offline soekris  Denmark
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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 Khz
Quote:
Originally Posted by bmxmen View Post
Hi Soren i have an information that we will have on dsp on dam1021, it will be some think like parametric equalizer? It is pasible to do it ?
No, the uC do not have program memory for doing any dsp management.
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