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Old 14th October 2013, 07:25 PM   #1891
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Originally Posted by audiodesign View Post
Which is your source ?
RME HDSP9632 pci cardbus
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Old 15th October 2013, 01:10 AM   #1892
i2k92 is offline i2k92  Indonesia
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You can set the startup Volume, see guide
It's OK now, thank you. BTW, I have a strange problem. Whenever I use the remote for my air conditioner, the DAC output become distorted with lots of pops which I'm afraid could break the speaker. The solution is very simple, turn on AC before the DAC perhaps I need to upgrade my AC into audiophile grade AC hahaha

After 12 hours, the sound is getting better.
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Old 15th October 2013, 05:11 AM   #1893
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Originally Posted by misterwolf View Post
yes, I tried now this solution, locked until 96khz.


Andrea,
after many hours spent in the last few days to try out the various solutions, that's enough.
Next Saturday will bring the dac in a recording studio to try the AES / EBU and SPDIF.
I hope to find that electrical inputs of the DAC work fine up to 192kHz.

Thanks
Also for AES / EBU should be better add the capacitor after the input transformer.
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Old 15th October 2013, 07:00 AM   #1894
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Default Guide

The save function store input, filter configuration and volume on PIC non-volatile memory.
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Old 15th October 2013, 07:17 AM   #1895
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Quanghao... I am looking to build a tuber buffer with a DAC, 32 bit and USB. The tube buffer will be from a supplier in China who is offering their version on the X10d Tube buffer. The one I am looking at is on a red board. The tuber buffer will be in the same case as the DAC but not connected and totally passive. I would like to have a single momentary switch to select SPDIF, Optical and USB inputs with LED displays. I was looking at one supplier that had a USB DAC on a yellow board with 3 LEDs showing USB, Optical and SPDIF on a board connected by a flat cable. Do you have anything like this or what would you recommend. Also I will be driving the buffer and DAC on separate triodial transformers. This is the board I was looking at for the DAC http://www.aliexpress.com/item/Free-...297634764.html. The X10D buffer is this one http://www.aliexpress.com/item/New-v...121382297.html

Merrisa

Last edited by Merrisasjc; 15th October 2013 at 07:26 AM.
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Old 15th October 2013, 09:48 AM   #1896
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Hi Merrisa,
For a tube buffer I would rather use an ACF2.
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Old 15th October 2013, 12:37 PM   #1897
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Originally Posted by Merrisasjc View Post
Quanghao... I am looking to build a tuber buffer with a DAC, 32 bit and USB. The tube buffer will be from a supplier in China who is offering their version on the X10d Tube buffer. The one I am looking at is on a red board. The tuber buffer will be in the same case as the DAC but not connected and totally passive. I would like to have a single momentary switch to select SPDIF, Optical and USB inputs with LED displays. I was looking at one supplier that had a USB DAC on a yellow board with 3 LEDs showing USB, Optical and SPDIF on a board connected by a flat cable. Do you have anything like this or what would you recommend. Also I will be driving the buffer and DAC on separate triodial transformers. This is the board I was looking at for the DAC Free Shipping! 1pc 24bit192K CS8416 + parallel dual WM8741 * 2 DAC decoder finished board usb input-in Other Electronic Components from Electronic Components & Supplies on Aliexpress.com. The X10D buffer is this one New version X 10D preamplifier kit (include 2 X 6N11 tubes)-in Integrated Circuits from Consumer Electronics on Aliexpress.com
Merrisa
The ES9018 DAC chip for each channel have a differential output so it is necessary a differential stage to create an un-balanced output to connect to your vacuum tube buffer.

You could use a single op-amp like show in my post #1859.

If you want to use a pure vacuum tube differential stage see my design on:
ES9018 USB DAC - Hi-Resolution System*

No problem to switch the 3 spdif sources (coax, toslink and aes/ebu) with a relay and led.
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Old 15th October 2013, 01:22 PM   #1898
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Hi Merrisa,
For a tube buffer I would rather use an ACF2.
Also this need a differential stage to get un-balanced output
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Old 15th October 2013, 01:28 PM   #1899
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Originally Posted by audiodesign View Post
Also this need a differential stage to get un-balanced output
True, I was thinking as a tube buffer for behind the LL1684 transformer.
ES9018 balanced -> LL1684 single ended -> ACF2 single ended
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Last edited by danny_66; 15th October 2013 at 01:31 PM.
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Old 15th October 2013, 07:18 PM   #1900
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I think I have caused some confusion.... I want the tube buffer to be a completely unconnected circuit to the dac. The buffer and dac will share the same case but have separate input and out puts. Only the pre out of the amp and main in on the amp will be connected to the buffer.

The DAC will only be connected to the Aux of the amp and whatever source I connect to it.

Basically stand alone circuits just sharing the same chassis. Both will have their own transformers and power supplies as well.
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