But reclocking is done after pcm to dsd conversation completed. So after conversation completed all of them is timers of 44.1Khz. Isnt it is wrong reclcok dsd with 48Khz?
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Let's say you have some 24/94 pcm files, HQplayer upsample them to 48k*128. Then you will need a XO in 49m to reclock it.
Sure you can run everything in 44.1k domain.
maybe i dare too much... but i had an idea...
i had on hand 4 lifepo4 cells each @ 3.3v.
what happen if i bypass the regulators of the output stage on the dsc2 and then supply 6.6v (3.3+3.3 series) to each rail ?
i have red the datasheet for the NXP 74ahct595d and it says that the abs.max for voltage is 7 volt so i am "safe" here.
also noticed that the speed increase a little with voltage...
what do you think ?
It will work for at least an hour. A worst-case lifetime of an hour is usually all that is guaranteed under absolute-maximum-rated conditions.
Most likely it will work much longer than that, but the 74AHCT595 may slowly drift out of spec. The threshold voltages of the MOS transistors in the 74AHCT595 will increase and the betas decrease due to various effects that get much worse at increased voltages, such as hot carrier injection and negative-bias temperature instability. That will make the device slower, but probably not non-functional.
Most likely it will work much longer than that, but the 74AHCT595 may slowly drift out of spec. The threshold voltages of the MOS transistors in the 74AHCT595 will increase and the betas decrease due to various effects that get much worse at increased voltages, such as hot carrier injection and negative-bias temperature instability. That will make the device slower, but probably not non-functional.
bisesik offers the manufacture of output transformers for any DAC - Output transformers for DACs
Ivan kindly provided me with a couple of transformers specially designed for DSC2 for testing.
I really like how they sound. I give them preference than standard chinese transformers.
Ivan kindly provided me with a couple of transformers specially designed for DSC2 for testing.
I really like how they sound. I give them preference than standard chinese transformers.
Attachments
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- Should I add additional snubbing or load to my output with the LL1684s?
Yes, in my case the waveform are very different when the tranformers are loaded.
What on earth is the board you have there ?
details... i need details
Do not worry.
According to the Open Hardware license, all DSC2 developments will be published in the public domain.
I got some free time. And also there were people who were ready to help bring the project to a commercial product for the HiEnd sector. The working name is DSD2extra. Only high-quality and expensive components will be used in the design. The board in the photo is just a model for testing new solutions on new microcircuits. The release will be in a different construct and in an expensive case. At the development stage, I can’t even imagine how much the finished copy will cost. Sales of this DAC do not interest me. The commercial side of things will be dealt with by other people.
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Not yet measured.
My measuring stand is now taken apart. It takes time to restore it.
Do not worry.
According to the Open Hardware license, all DSC2 developments will be published in the public domain.
I got some free time. And also there were people who were ready to help bring the project to a commercial product for the HiEnd sector. The working name is DSD2extra. Only high-quality and expensive components will be used in the design. The board in the photo is just a model for testing new solutions on new microcircuits. The release will be in a different construct and in an expensive case. At the development stage, I can’t even imagine how much the finished copy will cost. Sales of this DAC do not interest me. The commercial side of things will be dealt with by other people.
not worried at all... just anxious to upgrade my DSC
Good luck on that. If needed, i am here to help
Great then can you share most simple way to do reclock with only one clock.
I saw https://puredsd.ru/BBBreclk.pdf but it a little bit complicated for me to lean it.
Or maybe you can add it on your latest design file
if someone that is following is interested in one DSC2 fully operational, i am selling it over the swap meet section.
Is a good way to avoid some of the hassles involved in the building of such, for most, challenging device.
Is the second of the two's i have built. can't afford a second system at the moment
Is a good way to avoid some of the hassles involved in the building of such, for most, challenging device.
Is the second of the two's i have built. can't afford a second system at the moment
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Way back at post 563 there was a discussion about logic distortion starting at around 1mA.
I assume this 1mA relates to the nominal current through each resistor.
I see the current recommended resistors are 4k7-6k4 range, hence I assume set to be just under or on this point.
Has further analysis been done to qualify this, does anybody have any measurements they have saved?
Is the cause of the distortion yet understood?
Many thanks
bs