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Old 21st March 2013, 05:25 AM   #71
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Old 23rd March 2013, 09:20 AM   #72
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Quote:
Originally Posted by KlipschKid View Post
I think you're right - the re-clock means the quality of the cm is not so critical, so no need to upgrade resistors to thin film for this use.

Yes, 5534 sound good ! 627 are one of my favourite op amps. But for my headphone use, the 827 gave the best sound balance.

I look forward to seeing the new CM ! I hope you do one with an ES9023 dac ic. it's amazingly good for such a cheap IC, especially with a 50mhz saw oscillator as mclk.
the source is absolute critical, reclock can help but also add noise/jitter etc. Mostly, I think good source is better than reclock of a bad source. The new usb i2s is based on another famous chipset cm 44.1 and 48 bck is work at 128x lrck, es9018 like bck = 64x lrck and the universal shifter of my latest toy nos dac also need 64x lrck ...although 32bit i2s need bck = 128x lrck but there are not 32bit cd
USB has requirment on D+/D- trace impendence,
http://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf
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Old 28th March 2013, 08:26 PM   #73
MBA is offline MBA  Czech Republic
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It looks like the board follows the EVM circuit. Is there an easy possibility to connect a balanced power amp directly? How must the output be modified?

@diyinhk: are there any board modifications planned (regarding routing, regs, USB module pins etc.) in the near future?
Mike
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Old 30th March 2013, 11:00 AM   #74
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Quote:
Originally Posted by KlipschKid View Post
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Hi

Do you have the schematic of the AK4399 board ?

Thanks
Serge
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Old 1st April 2013, 03:59 PM   #75
MBA is offline MBA  Czech Republic
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@Serge: look for the AK4399 evaluation module schematics at AKM - I suppose it is the same.
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Old 31st May 2013, 05:14 PM   #76
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AK4399 has been deleted from AKM website :-(
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Old 1st June 2013, 02:32 AM   #77
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Here is datasheet. http://myl8test.files.wordpress.com/...k4399_f03e.pdf
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Last edited by Nanoloop; 1st June 2013 at 02:47 AM.
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Old 1st June 2013, 08:57 AM   #78
Page.P is offline Page.P  Czech Republic
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Thank you, I have one. But on AKM website there are no informations for this DAC. Hope it has not been canceled and it is only mistake!
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Old 4th November 2013, 11:53 AM   #79
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AK4399EQ | Product | AKM - Asahi Kasei Microdevices
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Old 8th January 2014, 04:26 PM   #80
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Location: Suwanee, Georgia
Hi,

Has anyone tried to run two run two of these boards in dual mono? I emailed the supplier at diyinhk and he replied that it is possible since the pcb has all the pin routes out. I just wanted to see if anyone has actually tried this and any advice / feedback.

Regards,
Todd
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