------------------------------ Hiface Evo Manual
10. I2S output
The I2S output provides raw I2S data out of the hiFace Evo on an RJ-45 socket. It has no
galvanic isolation so its ground connection is same as the USB one. Pinout is as follows
(pins are listed from left to right):
2,4,6,8) Ground
1) SDATA
3) LRCK
5) SCLK
7) MCLK
Lines are driven by high-speed, high-current buffers capable of 25mA current drive on
each line.

------------------------------ Buffalo II DAC Manual
TTL Level I2S
Make sure the SPDIF switch is open. Connect I2S signals as follows:
Source GND → GND
Source Bit Clock → DCK
Source Word Clock(LRCK) → D1
Source Data → D2

---

To connect I2S, I did following.

1. SPDIF switch is open on Buffalo II DAC board.

2. RJ45 cable following

RJ45 Buffalo II DAC

pin 1 --------- D2
pin 3 --------- D1
pin 5 --------- DCK
pin 2,4,6 ------ GND
pin 7,8 --------- not connected


But.......... no operation, source LED is light off.
What's the problem?

About 30cm. EXTREMELY? To operate it, how short the cable is exactly?
Shorter..., 10cm. not operate.

I'm using with volumite. Is it make a problem by different firmware from that of on board?

Or other thing is needed? for example pin-short on Hiface Evo side.

Edited by user Saturday, August 14, 2010 9:59:29 AM(UTC)  | Reason: Not specified

Can you get it to work via spdif?

i wonder if any other buffalo users are going straight from the hiface into the Buff-II

I received a reply from M2Tech.
"The pinout is refered to the RJ socket on the Evo, not to the RJ plug. So, with reference to the Wikipedia link you sent me, the pin numbers needs to be reversed."

Yes. They described in the manual "RJ Socket" and the pin number is reversed.

Finally, I've got sounds through I2S connection from Evo to Buffalo II DAC. But, heavy noise.
Dingo, you are right. I2S cable length should be extremely short.
Only the connector head is remained. Cable is short enough I think.

Noise is another problem I guess.

I run my Evo, Buffalo II with battery pack rechargable.
PCIE 1x USB card - Evo(12v DC) -(I2S) - BII(5v DC) - (balanced) - Focal Solo6 Be.

How can I remove this noise and get a clean sounds?

Please help.

Edited by user Tuesday, August 31, 2010 9:21:59 PM(UTC)  | Reason: Not specified

At last, I've got I2S sound with two device.
In Evo case, cause of I2S trouble is not the length of the cable and not needed a special method.
I appeal to the manufacturer this problem and had a faithful service.

Sound quality is another grade, clean and accurate compare with the spdif connection under same condition.
The cable? just old normal bundled in some.. CAT.5, length about 5cm.

CAT.7 2m cut in two 35cm,165cm and both are well done.
The shorter is strong and the longer is smooth relatively to each other.

Edited by user Sunday, October 3, 2010 7:15:40 PM(UTC)  | Reason: Not specified

UTP cabling is not need a special trick.
Normally UTP slot pin number read right to left,
but the pin number on Evo read left to right.( see the evo's manual)
2,4,6,8) Ground,1-SDATA 3-LRCK 5-SCLK 7-MCLK

Source GND → GND,Source Bit Clock → DCK,Source Word Clock(LRCK) → D1,Source Data → D2 (Buffall II manual)

2,4,6 -> GND
1 -> D2
3 -> D1
5 -> DCK
7,8 do not connect

If you got noisy signal as my case, you need M2Tech services.

---

Cable length? CAT.7-2m is operational(I test it). I am using 35cm.
CAT.5-40cm is well-done, but sound is dull compare with CAT.7.
I recommend CAT.7.

Edited by user Tuesday, November 23, 2010 10:28:57 AM(UTC)  | Reason: Not specified