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Old 22nd February 2012, 10:29 PM   #1011
exa065 is offline exa065  Canada
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Quote:
Originally Posted by Nikola Krivorov View Post
...I am still waiting to have my NTD1 finished as it is a very complicated build (including an EXAU2I ), did you have a chance to hear how it sounds?
It sounded great! Very natural, clean and detailed, with perfect base, no noise, no distortion, nothing to give you the slightest hint for imperfection.
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Old 23rd February 2012, 10:35 AM   #1012
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Just an insane unlikely idea:

Can you replace the clock on the exaU2i board?
- with another clock, with same MHz? (like crystek 950 cchd)
- with another frequency - like 100MHz ??
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Old 23rd February 2012, 02:54 PM   #1013
exa065 is offline exa065  Canada
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Default exaU2I Clocks Upgrade

Quote:
Originally Posted by pedefede View Post
Just an insane unlikely idea:

Can you replace the clock on the exaU2i board?
- with another clock, with same MHz? (like crystek 950 cchd)
- with another frequency - like 100MHz ??
You can replace the clocks, but you need to match the frequencies. Actually the next batch of exaU2I devices will come with upgraded custom 1 ps clocks.

-Best,

exa065
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Old 23rd February 2012, 03:02 PM   #1014
exa065 is offline exa065  Canada
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Default exaU2I-AckoDAC

Here is another ambitious exaU2I project. Supratek has commissioned AckoDac to build complete units of the exaU2I device integrated with their best Sabre based DAC.
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Old 27th February 2012, 02:35 AM   #1015
exa065 is offline exa065  Canada
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Default XMOS causes 2.5 ns Jitter?

Here is an interesting post by JarekC:

TAS1020B-based Asynchronous USB to I2S/SPDIF converter 24bit/96kHz

It appears that according to Larry, an XMOS employee:
" any external clock is resampled to 400MHz
If you tie I2S signals BCLK LRCLK and DATA to a low-jitter external
clock on the XMOS device, this will introduce a jitter in the order of
one to two 2.5ns (400MHz) cycles"

XMOS causes 2.5 ns JITTER? I will investigate this further.
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Old 27th February 2012, 09:35 PM   #1016
exa065 is offline exa065  Canada
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Default More DXD 352.8kHz 5.1 Test Tracks

2L has released more DXD 352.8kHz 5.1 test tracks. Check out their HiRes Download page at High Resolution Music DOWNLOAD services .:. FLAC in free TEST BENCH.
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Old 27th February 2012, 09:46 PM   #1017
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Will the dsd playback work for 5.1 or only 4 channels??
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Old 28th February 2012, 05:23 AM   #1018
Bunpei is offline Bunpei  Japan
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Quote:
Originally Posted by exa065 View Post
XMOS causes 2.5 ns JITTER?
Isn't it 4 times better than 10 ns that ES9018S chip has in its asynchronous resampling processing when you use 100 MHz oscillator for asynchronous MCLK?
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Old 28th February 2012, 01:16 PM   #1019
exa065 is offline exa065  Canada
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Quote:
Originally Posted by wildchild22 View Post
Will the dsd playback work for 5.1 or only 4 channels??
DSD will work only on four channels. As you know DSD works by using a workaround. It is not a standard feature of exaU2I.
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Old 28th February 2012, 01:32 PM   #1020
exa065 is offline exa065  Canada
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Default 108 ps jitter vs. 2500 ps jitter

Quote:
Originally Posted by Bunpei View Post
Isn't it 4 times better than 10 ns that ES9018S chip has in its asynchronous resampling processing when you use 100 MHz oscillator for asynchronous MCLK?
Isn't it 23 time worse than the 108 ps worst-case scenario jitter of exaU2I? Actually our estimate for exaU2I is 40ps.

2.5 ns is horrible
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