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Post by srb on Dec 23, 2010 12:15:20 GMT -5
Also I have the XDA-1 connected to to the UMC-1. No matter what setting it is eg. 16 bit, 44100 kHz etc .... the UMC-1 reports Sample Rate 48kHz It locks it too 48kHz no matter what you have in the settings. The XDA-1 has no digital outputs, so the only way to connect it to the UMC-1 is with the analog outputs. If you're then having the UMC-1 redigitize the analog signal to add bass management or other signal processing, any sampling frequency shown on the UMC-1 display has no relevance to what sample rate the XDA-1 can accept via USB input. Correct me if I am misinterpreting or not understanding the scenario. |
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Post by rocky500 on Dec 23, 2010 12:21:14 GMT -5
I am using anolog inputs on the UMC-1. Actually CD input.
Selecting Direct on the UMC-1. I thought this was the way to disable any processing on the UMC-1 and was straight path with no DAC conversion on the UMC-1.
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Post by srb on Dec 23, 2010 12:45:53 GMT -5
I am using anolog inputs on the UMC-1. Actually CD input. Selecting Direct on the UMC-1. I thought this was the way to disable any processing on the UMC-1 and was straight path with no DAC conversion on the UMC-1. That's correct. That's why I didn't understand what the reference was to the UMC-1 displaying a sample rate, since there is no sample rate associated with an analog signal. |
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Post by rocky500 on Dec 23, 2010 12:56:01 GMT -5
I see your point.
I have setup my UMC-1 to Computer to display through HDMI and sound through USB > XDA-1 > CD input
So what I'm seeing when I push info button on the UMC-1 Remote is not the sample rate of the XDA-1 then.
I am sure with the old drivers I could select between 44 and 48 and it would show on the UMC-1 this way.
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Post by srb on Dec 23, 2010 13:20:14 GMT -5
So what I'm seeing when I push info button on the UMC-1 Remote is not the sample rate of the XDA-1 then. Correct. What you're probably seeing is the current default audio mode setting of the digital input associated with that analog input if Direct was not selected. I am sure with the old drivers I could select between 44 and 48 and it would show on the UMC-1 this way. Again, I don't see how that would be possible as the XDA-1 has already performed it's digital to analog conversion, and the analog output has no sample rate. It's now an analog signal. If it did show a different sample rate, maybe it was showing the sample rate of the audio simultaneously being sent through the HDMI, which you're not using. |
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Post by Samuel on Feb 22, 2011 10:41:46 GMT -5
 Just wanted to get this thread active again, with all the new XDA-1 owners I thought it would be useful. If any op's have new information please post. I cant get anything to work above 44/48 and I have tried every driver I can find. Any new info out there?
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Post by vishal on Feb 22, 2011 17:02:26 GMT -5
I'd say this is a question for Emotiva. They should categorically be able to answer the following questions.
1. Can the USB input on the XDA-1 accept 24bit signals?
2. Can the USB input on the XDA-1 accept signals above 48KHz (i.e. 96/192 KHz)?
3. Is the Transfer Protocol for USB input on the XDA-1 Adaptive or Asynchronous?
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Post by PearlJam on Feb 25, 2011 17:09:12 GMT -5
It has been asked before (without answer):
Is there a reason why I should use USB if I am able to use the optical out from my motherboard?
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memst
Seeker Of Truth
Posts: 2
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Post by memst on Mar 5, 2011 10:04:24 GMT -5
2ALL
XDA-1 good work 24\96 (driver C-Media).
And good driver - usb-asio.de for 44,1 and 48K (ASIO full work).
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Post by preproman on Mar 12, 2011 16:29:50 GMT -5
OK, so what's the final word on this? Does the USB port have drivers that work ie 24/192 or should I just get the HiFace Evo or the (V-Link which doesn't need any drivers at all - 24/96) and go into the S/PDIF port. That's assuming that the S/PDIF port can playback 24/96 - 24/192?
What's the best rout to take if you have to come out your laptop via USB?
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Post by GMan on Mar 12, 2011 16:49:44 GMT -5
OK, so what's the final word on this? Does the USB port have drivers that work ie 24/192 or should I just get the HiFace Evo or the (V-Link which doesn't need any drivers at all - 24/96) and go into the S/PDIF port. That's assuming that the S/PDIF port can playback 24/96 - 24/192? What's the best rout to take if you have to come out your laptop via USB? The final word is that the USB port on the XDA-1 is USB 1.1. It does not have the bandwidth to support anything > 24/96. |
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Post by preproman on Mar 12, 2011 17:44:43 GMT -5
OK, so what's the final word on this? Does the USB port have drivers that work ie 24/192 or should I just get the HiFace Evo or the (V-Link which doesn't need any drivers at all - 24/96) and go into the S/PDIF port. That's assuming that the S/PDIF port can playback 24/96 - 24/192? What's the best rout to take if you have to come out your laptop via USB? The final word is that the USB port on the XDA-1 is USB 1.1. It does not have the bandwidth to support anything > 24/96. So is it confirmed that the S/PDIF inputs can? |
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Post by GMan on Mar 13, 2011 17:54:44 GMT -5
The final word is that the USB port on the XDA-1 is USB 1.1. It does not have the bandwidth to support anything > 24/96. So is it confirmed that the S/PDIF inputs can? Everything I've read says that Toslink does not have the bandwidth to support > 24/96 as well. Coaxial is the only way to get 24/192, assuming you had the appropriate hardware/drivers on the PC. |
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Post by bobbyt on Mar 13, 2011 20:09:27 GMT -5
Toslink is not bandwidth limited by any stretch of the imagination. The current version is good for 125 Mb/s!
16/44.1 is about 1.3 Mb/s.
24/96 would be (24/16) * (96/44) times more, or about 4.4 Mb/s.
24/192 would be (24/16) * (192/44) times more, or about 8.5 Mb/s.
Edit: USB 1.1 is 12 Mb/s, 1.4 MB/s. So it should handle higher bit/sampling rates...
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Post by GMan on Mar 14, 2011 0:26:57 GMT -5
Your calculations are off:
96,000 * 24 * 2 = 4,608,000
192,000 * 24 * 2 = 9,216,000
You're forgetting there's overhead involved i.e synchronization, error detection/correction, etc.
Regarding the Toslink support of 125 mbps, that may be for military or professional applications - I have yet to find any consumer grade electronics that claims to support that speed. The XDA-1 surely does not, otherwise, it would be a major selling point and would be mentioned in the product description.
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Post by bobbyt on Mar 14, 2011 0:51:02 GMT -5
I was just going in terms of multiples of 16/44.1. I guess regular PCM is 1400kbps, not 1300.
But in any event, the limit on Toslink is certainly not the medium but the processing, and I that was standardized. At any rate, I have trouble believing it can't handle formats that come in under 10 Mbps. Its wikipedia page claims all modern formats except for a couple of the multichannel Dolby/DTS.
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Post by Topend on Mar 14, 2011 0:54:23 GMT -5
Wouldn't it be great if the XDA-1 displayed the sample rate being received.
Dave.
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Post by dsnyder0cnn on Apr 5, 2011 20:58:04 GMT -5
Howdy, I'm still considering the XDA-1, but like you guys, I find that three serious issues make the decision hard even at its price point: - The display does not show the input wordsize and sample rate (why even have a display on a DAC if you're not going to show this information??)
- The USB implementation does not support high-rez files (Rega and others have made this a conciuos choice, but at least they spelled it out clearly in their features list and specifications)
- There's no HT Bypass
If I decide to go with the XDA-1, I'll pair it with the $899 Audiophilleo1 and the Emotiva USP-1 to get around these shortcomings. Or, for $100 less than this pile of gear (not including cables), I could just buy the Wyred 4 Sound DAC2 which addresses all of these issues in a single box and probably sounds almost as good (perhaps better??). -- David |
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DYohn
Emo VIPs 
Posts: 18,489
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Post by DYohn on Apr 5, 2011 20:59:50 GMT -5
An HT bypass in a DAC?
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Post by dsnyder0cnn on Apr 6, 2011 8:22:03 GMT -5
Howdy, Yes. It does sound crazy for a pure DAC. The XDA-1 purports to be more than this though given its remote control for input selection and variable output. The idea seems to be to connect the XDA-1 directly to a pair of XPA-1's, bypassing an active preamp for the shortest signal path and purest sound. While this is fine for folks who are building a dedicated 2-channel system, it's not so great for folks like me who were hoping to integrate the XDA-1 with their UMC-1 to upgrade 2-channel performance. An HT Bypass (a selectable pair of analog inputs that are routed directly to the outputs) would obviate the need for adding a USP-1 to the mix for this functionality. Rather than the XDA-1, I wish that Emotiva had produced two (or three) DAC's. The XDA-1 could be a pure DAC--no volume control, although a remote with input selection and power on/off would be ok. This would be their $300 base product. The XDA-2 would add basic preamp features from the USP-1 like motorized analog volume control, an analog input for SACD or an outboard phono pre, and a second analog input for HT Bypass (fixed level that runs directly from the ins to the outs). This could be their $500 DAC/pre. An XDA-3 that had a fully functioning 24-bit, 192kHz Asynchronous mode USB2 input with ASIO or similar drivers and possibly firewire or I2S inputs would make a nice $700 DAC/digital front-end. These could all be built on the same platform. Ok, I'm dreaming. Back to work. Cheers. -- David |
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Just wanted to get this thread active again, with all the new XDA-1 owners I thought it would be useful. If any op's have new information please post. I cant get anything to work above 44/48 and I have tried every driver I can find. Any new info out there?
