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Old 18th March 2013, 12:11 AM   #91
davada is offline davada  Canada
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Quote:
Originally Posted by 1audio View Post
I must point out that Win 7 handles audio very differently from XP. XP generally is better for measurement.

I just tried an experiment with the RME, the Juli ARTA and Praxis. I routed the digital output of the RME to the digital in of the Juli@ card. The Juli is set to external clock. The Juli now tracks the clock from the RME. From the control panel on the RME I can switch sample rates at will. I set both Praxis and ARTA to do an FFT and then, while measuring, I switched the sample rate from 192K to 96K. In both cases, except for a bad measurement it all ran right through. I am now setting up a CMEDIA 6631 demo board that has SPDIF in and I'll see what happens.
Well that's encouraging. So it's just a matter of getting the drivers right.
This is probably a silly question but is there documentation out there that explains how this is done. I'm wondering if some of the manufacture out there like Steinburg might give us a clue since they so willing share there technologies.
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Old 27th March 2013, 09:07 PM   #92
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What I would like is a simple logic decode from the essential switches: sample rate, clock source, that can control the ADC. There are really only two practical candidates, the TI PCM4222 and the AKM AK5394A I think. The ESS is unknown and the ARDA seems to be a myth. If there are others it would be interesting to know. This would make it possible for a single PCB to support both I believe.
ARDA ADC at1201 is available from some time now.. see AT1201

not cheap, though.

OTOH DAC at1401 seems to be a myth
Valeriano
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Old 27th March 2013, 09:19 PM   #93
Telstar is offline Telstar  Italy
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Originally Posted by Valeriano View Post
ARDA ADC at1201 is available from some time now.. see AT1201

not cheap, though.

OTOH DAC at1401 seems to be a myth
Valeriano
Less than 20$ is not too expensive, and it supports 384khz, which is GREAT.
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Old 29th March 2013, 03:07 PM   #94
1audio is offline 1audio  United States
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Originally Posted by Valeriano View Post
ARDA ADC at1201 is available from some time now.. see AT1201

not cheap, though.

OTOH DAC at1401 seems to be a myth
Valeriano

Have you measured it? The demo boards tend to be expensive and hard to get. I would want independent verification of its performance.
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Old 29th March 2013, 03:27 PM   #95
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Have you measured it? The demo boards tend to be expensive and hard to get. I would want independent verification of its performance.
I was pointing out that it's available. that's it.

I know for sure that is used in hi end gear . i.e. M2TECH Joplin 384Khz ADC
FYI some tech specs of this ADC (in this product) pls see http://www.m2tech.biz/joplin.html

there are some review links on the same page, you may get a reasonable performance figure of this chip

regards
Valeriano
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Old 29th March 2013, 05:28 PM   #96
Telstar is offline Telstar  Italy
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Originally Posted by 1audio View Post
Have you measured it? The demo boards tend to be expensive and hard to get. I would want independent verification of its performance.
The demo board is too expensive, about $400, I agree.
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Old 30th March 2013, 04:30 PM   #97
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Quote:
Originally Posted by Valeriano View Post
I was pointing out that it's available. that's it.

I know for sure that is used in hi end gear . i.e. M2TECH Joplin 384Khz ADC
FYI some tech specs of this ADC (in this product) pls see http://www.m2tech.biz/joplin.html

there are some review links on the same page, you may get a reasonable performance figure of this chip

regards
Valeriano
Whoa. $2,500 for an ADC! I don't see the value...
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Old 30th March 2013, 06:20 PM   #98
Telstar is offline Telstar  Italy
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it's a normal mid-tier price for a professional ADC. DAAD, Metric Halo and Prism all costs more.
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Old 30th March 2013, 06:34 PM   #99
1audio is offline 1audio  United States
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However as a recording interface its pretty lacking with single ended -10 dB inputs only. As is its not compatible with any mixers or similar. Its really an audiophile toy for transferring vinyl. But that is the right price for such a toy.

I could find no measurements looking through the reviews.
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Old 30th March 2013, 09:47 PM   #100
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it's a normal mid-tier price for a professional ADC. DAAD, Metric Halo and Prism all costs more.
Look, I don't care if it's got solid gold traces on the teflon PCB, there is no way that there are $2,500 worth of parts (or even half that much) in that box. I know how much parts cost, and I still say that I don't see the value at all. I guess that's why I do DIY.
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