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Post by 2channon on Feb 4, 2013 13:56:01 GMT -5
I asked what is the difference between a DAC and a DSP in the Stupid Questions section and got some really helpful answers. Now I would like to know what DAC chip the UMC-200 has in it. I already have one (see sig) but want to learn as much as I can about it.
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DYohn
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Post by DYohn on Feb 4, 2013 14:25:41 GMT -5
I'm not sure but it likely uses the Cirrus 4200 or 4300 series DACs which are designed to work with the Cirrus 4970 series DSP.
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Post by 2channon on Feb 4, 2013 15:53:39 GMT -5
I'm not sure but it likely uses the Cirrus 4200 or 4300 series DACs which are designed to work with the Cirrus 4970 series DSP. That sounds reasonable but there are a lot of chips in the 4300 series with very different numbers. I found that the Oppo 93 uses the Cirrus Logic CS4382A (24-bit). It would be nice to know exactly which chip we have  |
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Post by 2channon on Feb 4, 2013 16:49:52 GMT -5
I found that the UMC-1 uses one of these: CS42518/28 24 110 / 114 DACs; 114 ADCs -100 DACs; -100 ADCs 192 Differential DACs Differential ADCs VA = 5; VD = 3.3 or 5; VL = 1.8 to 5 Multi-Channel Multi-Channel CODEC, 8 DACs, 2 ADCs, S/PDIF Rx, Digital volume control 64 LQFP Maybe the UMC-200 uses the same? Attachments:
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DYohn
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Post by DYohn on Feb 4, 2013 16:51:55 GMT -5
Maybe the UMC-200 uses the same? That's likely a good bet. Why don't you call Lonnie and ask him? |
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Post by yves on Feb 4, 2013 17:03:57 GMT -5
That's likely a good bet. Why don't you call Lonnie and ask him? Maybe Lonnie doesn't know it, either. J/K... |
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Post by 2channon on Feb 4, 2013 17:04:37 GMT -5
Honestly because I don't know what I'm talking about and I don't want to waste his time on something like this that really doesn't matter one way or the other. It is just a curiosity with me. I would much rather he use his time with putting out new products than answer my nonsense.
But I would still like to know so if he, or anyone else, would like to put it on here that would be great.
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Post by Dark Ranger on Feb 4, 2013 17:09:50 GMT -5
I don't think it's nonsense. In fact, I think a lot of folks here would be interested to know what you find out.
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Lonnie
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Post by Lonnie on Feb 4, 2013 19:57:15 GMT -5
It uses the CS42518 driven by the CS495314 which is driven by the CS497024. The output of the CS42518 goes to 5532 I/V which then goes to the NJW1298 analog volume control for the main zone. The secondary zones and level shifters use other analog volume controls. I hope this helps.  Lonnie |
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Post by chaosrv on Feb 4, 2013 19:59:29 GMT -5
Show off |
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Lonnie
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Post by Lonnie on Feb 4, 2013 20:00:34 GMT -5
Show off ;D ;D ;D ;D |
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Post by 2channon on Feb 4, 2013 20:06:35 GMT -5
Thanks Lonnie. Now I have to take 6 years of collage to know what that means..LOL. I appreciate you taking the time to respond.
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Lonnie
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Post by Lonnie on Feb 4, 2013 20:08:52 GMT -5
Just look up the data sheets, that is what everyone else does. ;D ;D
Lonnie
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Lonnie
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Post by Lonnie on Feb 4, 2013 20:12:16 GMT -5
Actually the flow is very logical.
You have the main decoder (7024) which then goes to the post processor (5314) and from that to the DAC (518), from the DAC you need I/V converters (5532) which then feed the volume control (1298) and that goes out to your amp.
I kind of over simplified things here but you get the basic idea. ;D
Lonnie
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Post by 2channon on Feb 4, 2013 20:15:41 GMT -5
So to compare numbers, the Oppo-93:
24-bit Conversion
Up to 192 kHz Sample Rates
114 dB Dynamic Range
-100 dB THD+N
The UMC-200:
Eight 24-bit D/A, two 24-bit A/D Converters
110 dB DAC / 114 dB ADC Dynamic Range
-100 dB THD+N
System Sampling Rates up to 192 kHz
To my very uneducated eye the numbers look very close.
I've never heard the oppo (I know the 95/105 has the superior DACs) but it has some very good reviews.
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Lonnie
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Post by Lonnie on Feb 4, 2013 20:22:07 GMT -5
Yep they look pretty close to me as well. I thought about using a 32 bit DAC, but the real reason we haven't gone down that road is there just isn't any media to support it. So on a left justified DAC, it would just be filling in a bunch of zeros. Now having said that, I know a lot of people who swear they sound better and to them I am sure they do. In my humble opinion, I just can hear or measure it, so we will stick with it for the time being. Lonnie |
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klinemj
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Post by klinemj on Feb 4, 2013 20:28:44 GMT -5
2channon - isn't it great when the overall technical leader from a company jumps in and shares his info and logic behind his choices? Where else do you get this? It's a rarity in our modern world...and I love that we get such attention. Thanks Lonnie!
Mark
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Post by Dark Ranger on Feb 4, 2013 20:39:10 GMT -5
+1 what Mark said.
Thanks a bunch Lonnie for sharing that info with us. I have bookmarked this page for the expected future queries on this topic.
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hemster
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Post by hemster on Feb 4, 2013 21:06:32 GMT -5
Stickied... I'm sure this will come up time and again.
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Post by srrndhound on Feb 4, 2013 21:16:13 GMT -5
isn't it great when the overall technical leader from a company jumps in and shares his info and logic behind his choices? Where else do you get this? It's a rarity in our modern world...and I love that we get such attention. It's not hard to find out. Anyone with a screwdriver could have looked under the bonnet. |
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