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#1121 |
diyAudio Member
Join Date: Feb 2011
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Note taken. We will do better next time.
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#1122 |
diyAudio Member
Join Date: Feb 2011
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I've just moved the discussion about using exaU2I with the Twisted Pear SPDIF Transceiver to a new thread: exaU2I Connected to the Twisted Pear SPDIF Transceiver. This is a brand new application for exaU2I and it deserves its own space.
Last edited by exa065; 27th June 2012 at 12:45 PM. |
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#1123 |
diyAudio Member
Join Date: Jun 2008
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Just curious, with the EXAU2I, assuming the same software is used, does the PC matter any more? i.e. AMD vs Intel Cores vs Intel ATOM, slow vs fast CPU, quality of the USB port/cable/length etc?
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#1124 | |
diyAudio Member
Join Date: Feb 2011
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Quote:
Many will disagree, and I respect their opinions. I am always interested to participate in listening tests, and to experience different ways of doing high-end audio. Regards, exa065 |
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#1125 |
diyAudio Member
Join Date: Feb 2011
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Here are exaU2I /ES9018 DAC noise floor measurements with and without ground isolation. Both measurements are taken with the exaU2I USB cable connected to a standard PC: no special power supplies or filters, regular hard drive, I7 CPU, standard USB 2.0 controller. The exaU2I is powered by the USB cable. For the second measurement the USB ground is connected to the DVCC DAC ground with 1MOhm resistor.
You can clearly see the benefit of using Galvanic isolation. It is impossible to achieve this level of common noise suppression with USB and SATA filters, audiophile grade USB controllers, or by "cleaning" computer power lines. |
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#1126 |
diyAudio Member
Join Date: Jun 2008
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thanks George.
that's exactly what I want to hear. Getting an audiophile grade PC costs a fortune after I did some research. linear power supply, fanless cooling with Intel cores ... special USB cards ... silver SATA and USB cables ... no thanks. I thought the EXA is to eliminate all of those requirements. But then, what's the minimum requirement on the CPU? Is an ATOM fast enough? |
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#1127 | |
diyAudio Member
Join Date: Jul 2009
Location: Brisbane
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Quote:
how much memory? sorry if you have mentioned this earlier. |
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#1128 |
diyAudio Member
Join Date: Feb 2011
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Our ASIO drivers are very efficient. An Atom CPU can support 384kHz / 4 channels at about 40% load. I recommend i5 CPU and 4GB memory to be able to handle audio and HD video.
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#1129 | |
diyAudio Member
Join Date: Sep 2007
Location: Multiple...
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Quote:
I do not want to think of what evils ![]() So I am waiting for ALSA drivers to use the exaU2I with MPD ![]() Last edited by RayCtech; 1st July 2012 at 01:33 PM. |
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#1130 |
diyAudio Member
Join Date: Feb 2011
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Perhaps the Foobar visualizations, I don't have an Atom net-book handy to redo the test.
(When I come to see you later this month, we can compare apples with apples ![]() Last edited by exa065; 1st July 2012 at 01:13 PM. |
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Thread | Thread Starter | Forum | Replies | Last Post |
Ultimate USB to I2S interface | sampler | Digital Source | 206 | 30th January 2012 03:45 PM |
High Resolution Multi-Channel Digital Interface | Brian Brown | Digital Source | 34 | 15th January 2008 06:48 PM |
interface I2S with USB | mermoz | Digital Source | 0 | 21st February 2003 10:34 AM |
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