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#501 | |
diyAudio Member
Join Date: Jan 2010
Location: Somerset, England
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Quote:
I have considered the Chinese DSC1 boards available from ebay but I wonder about their use of only 1% tolerance resistors? |
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#502 |
diyAudio Member
Join Date: Aug 2015
Location: Russia
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The accuracy of the resistors is not the main parameter here. There is no difference between 1% and 0.1%. The noise parameters and the impulse response of the resistors are more important.
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#503 | |
diyAudio Member
Join Date: Sep 2006
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Quote:
Assuming my DIYINHK XMOS USB interface plays nice with it. I'll report back in due course. Mark |
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#504 |
diyAudio Member
Join Date: Sep 2006
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Found a little time today - have music. Using DSD512 it sounds really very good.
But I have some noise in the background that seems uncorrelated to the signal, varies in intensity but at its loudest is very detrimental. It starts when I hit Play in HQPLayer, even before the music starts. Is this something characteristic of this approach to "decoding" or can I hope to drive it away and let the good music flood through. Need to figure how to auto the mute too - almost drove my Utopia drivers through my eardrums on one occasion. Not good for me or my cans! More later. |
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#505 | ||
diyAudio Member
Join Date: Aug 2015
Location: Russia
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#506 |
diyAudio Member
Join Date: Sep 2006
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Hi PPY
Thanks for the information. I (perhaps foolishly) sold my Amanero i/f sme tme ago. Maybe should consider buying another. I considered the differential board but am not a big fan of transformers and my headphone rig is single-ended end to end so it would not be an ideal match. I'm fiddling with different filters in HQP, not sure if it is really making a difference but does seem to vary. I need to listen to it over some time and decide if this noise (which is really no worse than typical vinyl background in level) is going to be something I can't live with. I've only sat down and listened for a couple hours so far, but the music itself is sounding very good, kind of organic. I should have some time over the weekend for more listening and I've had it running overnight to get some signal through the caps and op amps. Mark |
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#507 | |
diyAudio Member
Join Date: Aug 2015
Location: Russia
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#508 |
diyAudio Member
Join Date: Jul 2010
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#509 |
diyAudio Member
Join Date: Jul 2010
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Perhaps not the main parameter, but if you read the thread here, people have confirmed better performance (measured) with higher precision resistors. I suspect that at least .1% should be used, some have gone to .05% and reported improvements. Susumu thin film at this precision at not that much money (we are not talking about foils or anything)
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#510 |
diyAudio Member
Join Date: Sep 2006
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Don't want to push the thread off topic but following my recent experience with the chinese DSC derivative (mostly a clone of Jussi's design) which sounded good except in the really quiet passages, an improved implementation of the DSC1 principle would be nice. I know there is the balanced version from the same ebay team and I will probably get one of those in time.
However, as an enthusiastic owner of the Soekris R-2R DAM1121, it occured to me that it might be possible to create an alternative firmware for that device which would repurpose the ladder as a DSC1 type filter. This is very similar to what Holo Audio have done with their Spring (and one version of the forthcoming Cyan dac). The Soekris sounds great on PCM, precision of resistors is not such an issue on the DSC1 due to the averaging nature of the process, many of us already own a Soekris dac, what do you guys think? We could speak nicely to Soren... |
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