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Old 27th August 2011, 08:44 AM   #11
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There is a new chip coming soon AT1401 from ARDA Arda Technologies - Home
Looks very promising
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Old 27th August 2011, 08:56 AM   #12
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I for one am not holding my breath on that part a new multibit DAC chip Arda technologies AT1401

Summer'll be over in a couple of days and not a peep

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Originally Posted by qusp
i only mentioned it as the question was asked what chips can use this mode 24bit NOS and as you mentioned, i would much rather run a part designed for audio
I get the impression the original 'NOS' was referring to replay of multi-bit rather than single bit audio. DSD is already heavily oversampled at the recording stage.

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Originally Posted by qusp
the reviewed unit looks interesting enough, but in trying to shun the usual audiophile scenario, they have created their own. i mean do you really need that much smoothing in a dac with decent regulators?
What gives me the heebiejeebies in their blurb is talking about their heavily filtered dual toroidal PSU. From the pics I can't see any filtering, let alone of the heavy kind. Two paralleled toroidals is double trouble when it comes to mains noise ingress.
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Last edited by abraxalito; 27th August 2011 at 09:12 AM.
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Old 27th August 2011, 09:18 AM   #13
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yeah the arta thing never came to anything, i pop my head in there myself from time to time. so you didnt see the 2 box build with a massive bank of parallel caps? massive for a dac anyway and from my understanding of modern IC regs, they dont even really like too much capacitance at the input, or output.

again, I only made reference to DXD as you asked me directly what might need speed that high. the sabre NOS mode can be used for any speed and applies just as well to 24 or 32/384+ if you like. i personally do use realtime 384khz sampling for playing my own analogue modelled synth and piano plugins for logic, not in NOS mode though, as its just on the boundary of still being able to use OS. this is generated on the fly at that speed with models, no upsampling
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Old 27th August 2011, 09:26 AM   #14
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Quote:
Originally Posted by qusp View Post
so you didnt see the 2 box build with a massive bank of parallel caps? massive for a dac anyway and from my understanding of modern IC regs, they dont even really like too much capacitance at the input, or output.
Yes I did see that - I kinda filtered it out because its so common to see massive oversupply of electrolytics.

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again, I only made reference to DXD as you asked me directly what might need speed that high. the sabre NOS mode can be used for any speed and applies just as well to 24 or 32/384+ if you like.
I have no experience with the Sabre so please correct me if I've got the wrong end of the stick here, but I figured the whole architecture is a noise-shaped, low-bit one (I have read some datasheets but they're hardly gospel). So kind of anathema to the NOS crowd who are looking for purist digital - no noise shaping and no digital filtering whatsoever.
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Old 27th August 2011, 11:23 AM   #15
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no, you're right, i guess i wasnt taking such a purist view; i was just referring to the OS filter being able to be turned off.
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