USB to I2S: M2Tech vs XMOS vs Open-source Qnktc - Page 4 - diyAudio
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Old 2nd April 2012, 07:34 AM   #31
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After 3 tests in 2 different rooms, 3 differents systems, with 3 my friends I can affirm that XMOS module by Lorien is the best.
There are many differences in the listening and only the XMOS has an open sound, full of details and never tiring.
With the XMOS all musical instruments are easily recognizable in the sound stage.
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Old 2nd April 2012, 01:12 PM   #32
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Quote:
Originally Posted by audiodesign View Post
I need to specify that the Twistedpearaudio.DAC with Sabre ESS ES9018 cannot be considered a good DAC module for this test because it does not use the master clock of the I2S bus generated by the USB-I2S interface.
The Twistedpearaudio.DAC reclock and resample with another oscillator so the sonic performances with Twistedpearaudio DAC could be completely different, worse or better, but in any case the accuracy of the modules USB-I2S is not used.
Actually, it is easy to use an external master clock with the Buffalo. There are pads for attaching the external clock, and the existing xo can simply be powered down.
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Old 2nd April 2012, 02:03 PM   #33
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Quote:
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Actually, it is easy to use an external master clock with the Buffalo. There are pads for attaching the external clock, and the existing xo can simply be powered down.
Could you post a pic?
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Old 3rd April 2012, 08:30 AM   #34
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I sell the M2Tech USB to I2S module by AckoDAC (https://sites.google.com/site/ackodac/home) at 80 euro + shipping
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Old 3rd April 2012, 04:27 PM   #35
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AudioDesign ... any chance you are able to get in the ExaDevice for comparsion? Am really interested to know who is the King of USB 2 I2S
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Old 3rd April 2012, 05:21 PM   #36
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I hope to get the ExaDevice soon
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Old 4th April 2012, 06:22 AM   #37
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Last environment still to test with my friends

XMOS module + AD1955 with passive I/V (200 ohm Caddock MK132) + 12AU7 differential stage with fet current gen. + IRF720
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File Type: jpg XMOS_AD1955_200ohm_12AU7_IRF720.JPG (203.2 KB, 1030 views)

Last edited by audiodesign; 4th April 2012 at 06:25 AM.
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Old 7th April 2012, 04:23 PM   #38
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The new output stage with AD1955 and 12AU7 sound very good!

I am selling some parts:

anna.maria66 | eBay
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Old 15th April 2012, 03:07 PM   #39
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Here the my new environment to test 2 output stages with AD1955 in passive I/V configuration.

1) my hybyid design with differential ECC82 + IRF720 (see schematic)

2) 5687 in Raleigh Audio Line Stage clone (Chapter 4) using K & K Audio (K & K Audio - Lundahl Transformers, audio DIY kits and more) CCS modules.

The second is more expensive but it sound a little better than first.
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File Type: jpg phtestdac.JPG (217.2 KB, 799 views)
File Type: gif HybridOut.gif (28.9 KB, 786 views)
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Old 18th April 2012, 11:54 PM   #40
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Default Can you detect the i2s sample rate?

Hopefully you can program the PIC for auto detection.

Some ref,
Frequency counter with PIC and 4- to 5-digit LED display

In Japanese i2s counter (go to bottom, using 16F819 no need for external XO)
http://easyaudiokit.hobby-web.net/be...acc/MBacc.html


Quote:
Originally Posted by audiodesign View Post
Here the my new environment to test 2 output stages with AD1955 in passive I/V configuration.

1) my hybyid design with differential ECC82 + IRF720 (see schematic)

2) 5687 in Raleigh Audio Line Stage clone (Chapter 4) using K & K Audio (K & K Audio - Lundahl Transformers, audio DIY kits and more) CCS modules.

The second is more expensive but it sound a little better than first.

Last edited by 2A3SET; 19th April 2012 at 12:20 AM.
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