isnt the i2s is PCM so hence the xmos receiver isnt converting the dsd to pcm?
Soekris Engineering, Inc. | products dac1101 has DSD capability so does it has the DSD decoding straight or its converting it into pcm via XMOS through USB?
Or if its straight then soren has the DSD supporting firmware.
Soekris Engineering, Inc. | products dac1101 has DSD capability so does it has the DSD decoding straight or its converting it into pcm via XMOS through USB?
Or if its straight then soren has the DSD supporting firmware.
The XMOS has nothing to do with the DSD signal, the signal sending thru the XMOS USB to I2S is just "pretending PCM" (DoP), however, when it is DoP signal, the XMOS will flag an extra signal telling the DAC that it is DSD signal.
Please correct me if I am wrong.
so i2s is a PCM signal so when its converted to pcm then it should be fine i believe? we are still converting the DSD to pcm and then using it.
DoP DSD over PCM signal is again different I think that soren should implement as promised long time ago in the firmware.
If the dam1101 has DoP firmware then soren can release it.
DoP DSD over PCM signal is again different I think that soren should implement as promised long time ago in the firmware.
If the dam1101 has DoP firmware then soren can release it.
REV3
0.02% resistor version is Back, in Rev3 🙂
Soekris Europe » DAC modules - dam1021 » dam1021-02: 0.02% resistor version - comes back soon
What is the Rev3 ? new Vref ?
0.02% resistor version is Back, in Rev3 🙂
Soekris Europe » DAC modules - dam1021 » dam1021-02: 0.02% resistor version - comes back soon
What is the Rev3 ? new Vref ?
The power supply and dc-dc converer electrolytic caps are 820uF. I reckon it may still be a photo of the V1 board, unless the caps have been changed back to 820 from 1000uF.
Curious to know what has been update/upgraded.
Ryssen, did you check the buffer b1 output against the original outputs when it comes to sound quality ?
Just found in Soekris EU site that the dam1021-02 0.02% rev.3 is about to launch by the end of this month. Could Soren briefly describe what's changed compare to rev.2? Thanks.
rev3:
I now use a custom resistor value on all new boards, so all the 3M01 "fine adjust" resistors will be removed. That leaves space for an additional 300 uF ceramics on each vref.... Otherwise there are no changes and the rev3 is firmware compatible with the other revsions.
DSD:
As stated earlier, I will add DSD support, the firmware is upgradeable: Of course the FPGA will first convert it to 384 Khz PCM, then upsample, pass filters and do digital volume control.
But DSD should be avoided, the point of the R-2R DAC is to avoid delta sigma converting, which DSD is per definition, is really only if you have material in DSD format only....
I now use a custom resistor value on all new boards, so all the 3M01 "fine adjust" resistors will be removed. That leaves space for an additional 300 uF ceramics on each vref.... Otherwise there are no changes and the rev3 is firmware compatible with the other revsions.
DSD:
As stated earlier, I will add DSD support, the firmware is upgradeable: Of course the FPGA will first convert it to 384 Khz PCM, then upsample, pass filters and do digital volume control.
But DSD should be avoided, the point of the R-2R DAC is to avoid delta sigma converting, which DSD is per definition, is really only if you have material in DSD format only....
Hi,
What level of the average drift (%) of those custom made resistors should be expected pet say after 2000 h of working?
What level of the average drift (%) of those custom made resistors should be expected pet say after 2000 h of working?
This picture is very, very old. It is of an early prototype, before even the first production run.
Hi Soekris,
For ver3, will it be produced with 0.01% version?
And for duel mono configuration which combined with 2 boards, will there any benefit on sound quality?
Thanks!
For ver3, will it be produced with 0.01% version?
And for duel mono configuration which combined with 2 boards, will there any benefit on sound quality?
Thanks!
Not A/B test just listened on the RAW before I installled the B1.
Hard to tell the difference..
Seems the v3 dam follows a similar resistor layout as the 1121 OEM module that's due to arrive. Not a big deal as we all have been modding vref better anyway, but good to see those changes on the DIY module just the same.
1.Thats the good part regarding the new resistor upgrade it will even reduce the shot noise as you use less resistors.
2. Regarding the DSD does it supports it natively? or the DSD has to be converted to pcm.
3. Can we upgrade the firmware in the ver1 and ver2 boards to get the DSD support?
when is the date you will be releasing the firmware?
From Sören a couple of posts earlier:
".... Of course the FPGA will first convert it to 384 Khz PCM, then upsample, pass filters and do digital volume control."
//