It is not possible to apply convolution filters or equalizer while maintaining the DSD format
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Maybe Iām misunderstanding your statement, but it is possible but CPU intensive, see screenshots ā¦
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Thank you. But only with DSD source.
If Iād like upsampling from PCM to DSD I canāt
Why on earth do you want to have native DSD processing on an upsampled file. Youāre wasting a ton of energy for what is likely zero gain.
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So are software like HQPlayer useless?
Use hqplayer in Roon if itās what you want. Personally I see no point in upsampling at all and heard zero differences to my RME dac. If you feel it does then use something that gives you what you want. Roons DSP will always be applied first and upsampling at the end of the DSP path.
My DAC Burr-Brown havenāt an usb audio, so i canāt use hqplayer.
For my like Roon is sufficient, but with adjustments.
What RME have you got?
Are you aware that, technically, this makes no sense?
Can you comprehensibly explain what gains youāre expecting from that exercise?
If you havenāt taken proper care of room acoustics and selection of appropriate transducers and amps, all your efforts upstream will be swamped completely by orders of magnitude higher distortions to render any further thought meaningless - and Iām not even talking about upsampling and using bit-stream-formats, yet.
Remember, although any signal contributions are additive in nature, auditory impressions follow a logarithmic scale.
So, Iām all ears 
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ADI 2 DAC FS 2nd edition with AKM chips. Love it to bits great reliable dac.
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Iām sorry if you are disappointing about conversion from PCM to DSD, but softwares like HQPlayer are mostly used for PCMā>DSD
This one? RME ADI-2 DAC FS - D/A 32-bity/768kHz
DSD up to ā¦
Yes thatās it. If new will be the 3rd edition with the ESS chip as the AKM fire made them have to change to ESS but itās the same DAC overall and performance the same.
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I prefer the AKM to the Saber ESS.
But how far does DSD go? DSD 1024?
no a sensible DSD256.
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No disappointment on my side, but I guess a language barrier causes your misunderstanding, since actually, I specifically asked you a question.
Given that I do not address the question in terms of faith or certainties, but I am pleased to experiment and try to understand, according to my abilities and experiences, I am going to explain what I have read and which has partly convinced me and I would like to try. The first reason for converting from PCM to DSD is that the vast majority of DACs on the market today are Sigma-Delta and therefore in fact convert everything into 1bit i.e. into DSD. But this conversion is carried out without great control possibilities and with the limited means , compared to an external computer, of the processor inside the DAC. The second reason is that the conversion to DSD should allow you to obtain a result to be transmitted directly to the DAC, which no longer performs any further conversion and therefore should work better. The third reason is yet to be proven and I like to try it. Iām referring to the more āanalogā sound of DSD compared to PCM. I have no prejudice towards PCM nor towards DSD. But I like to be free to experiment, to welcome suggestions and then leave it to my ears and my brain to recognize any differences and choose the solutions that I find most satisfying.
Itās a very long thread at this point but all of these points are discussed here with specific DACs, there revisions, and why few chips / DACs will do what you describe but not most.
https://community.roonlabs.com/t/best-native-dsd-dacs-for-use-with-hqplayer/
All Sigma-Delta, then most dac. ESS, AKM in different way. Except Burr-Brown with a NOS path and the R2R with NOS path