Poor probing technique, but about the right frequency. Do you have the probe set to 10x? Is the ground lead connected?
For anyone using or wanting to try my alternative configuration files: there was a bug in the DSD remodulating function. Version 1.5 is supposed to solve this, see https://www.diyaudio.com/community/threads/return-to-zero-shift-register-firdac.379406/post-7895559
Does anyone have a spare PCB or planning for a group buy of this? I'm getting my DSC board soon and would love to have this for the sample rate conversion
Hello,
I am going to order a batch with the spartan chip already soldered. If anyone is interested...
Thanks
I am going to order a batch with the spartan chip already soldered. If anyone is interested...
Thanks
Better in what way? FPGA is better in terms of portability and completeness of a dac in a box. SQ of the latest PJotr25 FPGA code version is similar to HQ Player @DSD256 without needing a powerful PC (although reclocking just before the dac may be helpful in some cases).
OTOH, HQ Player has many options to choose from, and can work at higher sample rates than DSD256.
OTOH, HQ Player has many options to choose from, and can work at higher sample rates than DSD256.
The firmware is free to use (for diy purposes only). If you study the first post of this thread, it should provide all the information you need in order to find firmware, Gerbers, BOM, etc.
I have the PCM2DSD board, I only need to put the software in FPGA but don't have the hardware please could you remember me what's needed & where to buy to try the PJotr25 FPGA software also please link where download it. I I left the project because I did not liked the sound quality but if you said now the SQ is similar to the famous HQPlayer I'm intrigues & interested to try. Last question is needed more hardware apart from USB-I2S (I own the latest Amanero Combo768) like clocks, etc.?
TIA Mark
Felipe
TIA Mark
Felipe
Felipe,
The latest firmware can be downloaded at: https://www.diyaudio.com/community/threads/simple-dsd-modulator-for-dsc2.370177/page-42#post-7407495
You would also need a JTAG programmer (which is hardware), and need to download and install software from Xilinx called "Impact"
An example JTAG programmer and cables could be like this: https://www.ebay.com/itm/285619833571?_skw=jtag+programmer&itmmeta=01JJ2TNPYYBWTM0DFXGN633NRV&hash=item428044cae3:g:HVQAAOSwIitlhcC8&itmprp=enc:AQAJAAAA8HoV3kP08IDx+KZ9MfhVJKmc/tYRWmt7wjZo2sH0zwFM+sVNsrTAPZU/kPVZ1vkEwfOX6qs63iIz1L4e5Uh8rKq0CK6OTYtBCH61ZF0YaKjqpqaBSiSv8EzmOORyfuobl0dy3pveqTqT6FXDLhrOqv+hSLSWkE2o9OOyHKAX3rUneDQoaaFe86m6/Oyty6nJvtCG89ZtDa6Rl8srdmmOz8u2ok8zPgpqoTDVo2ak6Y1TKbTkjxzGMMAG2PwS2rcsYoLJgj--AXhuAFs4+MyVFTvLINs4iQezo3sBZDHY81dki/LqQRGj84Gm4KOQgQNQfA==|tkp:BFBM4O_W2pBl
Once you have the FPGA board fully populated, have a JTAG programmer with cables, and the Impact software is installed, then there are instructions in this thread that explain the procedure to do the programming.
Best,
Mark
P.S. For best results, people I am talking to via PM tend to report they get the best sound using external clocking of the USB board, and then some kind of reclocking before the dac. In another thread @Cestrian has said he is working on a simplified board intended for use with @MarcelvdG RTZ dac. From what I have seen privately, I would expect some more info to be shared in the forum before too long. The other approach that can be used is described in my Clock Board thread, but its more complicated than the solution Cestrian has been working on.
The latest firmware can be downloaded at: https://www.diyaudio.com/community/threads/simple-dsd-modulator-for-dsc2.370177/page-42#post-7407495
You would also need a JTAG programmer (which is hardware), and need to download and install software from Xilinx called "Impact"
An example JTAG programmer and cables could be like this: https://www.ebay.com/itm/285619833571?_skw=jtag+programmer&itmmeta=01JJ2TNPYYBWTM0DFXGN633NRV&hash=item428044cae3:g:HVQAAOSwIitlhcC8&itmprp=enc:AQAJAAAA8HoV3kP08IDx+KZ9MfhVJKmc/tYRWmt7wjZo2sH0zwFM+sVNsrTAPZU/kPVZ1vkEwfOX6qs63iIz1L4e5Uh8rKq0CK6OTYtBCH61ZF0YaKjqpqaBSiSv8EzmOORyfuobl0dy3pveqTqT6FXDLhrOqv+hSLSWkE2o9OOyHKAX3rUneDQoaaFe86m6/Oyty6nJvtCG89ZtDa6Rl8srdmmOz8u2ok8zPgpqoTDVo2ak6Y1TKbTkjxzGMMAG2PwS2rcsYoLJgj--AXhuAFs4+MyVFTvLINs4iQezo3sBZDHY81dki/LqQRGj84Gm4KOQgQNQfA==|tkp:BFBM4O_W2pBl
Once you have the FPGA board fully populated, have a JTAG programmer with cables, and the Impact software is installed, then there are instructions in this thread that explain the procedure to do the programming.
Best,
Mark
P.S. For best results, people I am talking to via PM tend to report they get the best sound using external clocking of the USB board, and then some kind of reclocking before the dac. In another thread @Cestrian has said he is working on a simplified board intended for use with @MarcelvdG RTZ dac. From what I have seen privately, I would expect some more info to be shared in the forum before too long. The other approach that can be used is described in my Clock Board thread, but its more complicated than the solution Cestrian has been working on.
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Filipe,
I just gave you a link to a JTAG programmer on ebay in my last post, #1,113.
For Impact software, just do a google search for "Xilinx Impact Download" (without the quotes). Getting the software to work in Windows can be tricky, but I posted previously in the thread about it. Also, I think there is a version of Impact that can run more simply and directly in Windows, but I didn't use that one. Maybe someone else knows where to download it.
Also, maybe some more info at: https://adaptivesupport.amd.com/s/question/0D52E00006iHouHSAS/impact-download?language=en_US
Mark
I just gave you a link to a JTAG programmer on ebay in my last post, #1,113.
For Impact software, just do a google search for "Xilinx Impact Download" (without the quotes). Getting the software to work in Windows can be tricky, but I posted previously in the thread about it. Also, I think there is a version of Impact that can run more simply and directly in Windows, but I didn't use that one. Maybe someone else knows where to download it.
Also, maybe some more info at: https://adaptivesupport.amd.com/s/question/0D52E00006iHouHSAS/impact-download?language=en_US
Mark
Thanks Mark.
I have Twisted Pear re-clocker with 22,xxx & 24,xxx NDK SDA clocks that I guess are enough for the Amanero Combo768?
What's your Fifo advice because I not have.
Now I'm not using DAC, I only use a LC Low Pass Filter, have I to buy one?
Thanks again for your time & help.
I have Twisted Pear re-clocker with 22,xxx & 24,xxx NDK SDA clocks that I guess are enough for the Amanero Combo768?
What's your Fifo advice because I not have.
Now I'm not using DAC, I only use a LC Low Pass Filter, have I to buy one?
Thanks again for your time & help.
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Not IME; have a TP reclocker in my junk box where IMHO it belongs. Too much jitter for me.
FIFO or ASRC is only needed for SPDIF/TOSLINK. Not needed for USB. Best FIFO right now for this is probably FIFO_Pi. It would need to go before the final reclocker though (the one just before the dac, or just before the final LPF, whichever the case may be).
You can continue to use LPF if you want. Some people may feel that a @MarcelvdG RTZ FIRDAC is better, especially if configured carefully. However its more more complicated and costly to do it well, as compared to the attractive simplicity and low cost of a LPF.
It may be interesting to also try my alternative configuration file then and see which works best with your set-up. https://www.diyaudio.com/community/threads/return-to-zero-shift-register-firdac.379406/post-7895559
I use the one I designed. Its in my clock board thread. The exact link to the reclocker can be found in the first post of that thread: https://www.diyaudio.com/community/threads/general-purpose-dac-clock-board.413001/