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-   -   Hiface USB -> I2S 24bit/192Khz (http://www.diyaudio.com/forums/group-buys/166354-hiface-usb-i2s-24bit-192khz.html)

audiodesign 5th May 2010 12:30 PM

Hiface USB -> I2S 24bit/192Khz
 
To play high resolution materials like the 24bit 192KHz Studio Master it is necessary an USB to I2S interface to drive any DAC chip.

I have contacted M2Tech to produce this module with this specification:

http://www.audiodesignguide.com/M2TO...ov-08-2009.pdf

If we will arrive to 100 items they can produce and sell this module at 50 euro each.

Please add your member id in the following list and update the total:

2 x audiodesign
......


now the total is 2

regal 5th May 2010 12:40 PM

How are they handling galvanic isolation? The datasheet link doesn't work.

audiodesign 5th May 2010 12:43 PM

This is the link

http://www.audiodesignguide.com/M2TO...ov-08-2009.pdf

GuidoR 5th May 2010 12:56 PM

Option 4, obviously? :D

Valeriano 5th May 2010 01:06 PM

Hi Andrea.

very interesting GB :)

HiFace OEM is available in four models :

part.no. M2TOEM-01-1 is Bus powered
part.no. M2TOEM-01-2 is External 5V / Filtered bus power
part.no. M2TOEM-01-3 is External 3.3V + 1.8V
part.no. M2TOEM-01-4 is External 3.3V + 1.8V / Filtered oscillators pwr

M2TOEM-01-4 is the most flexible, external supplies for +1.8 +3.3 and Vosc (+3.3).. does Marco (m2tech) require a single model for this GB?

Ciao
Valeriano


EDIT : Guido you're faster than me:)

GuidoR 5th May 2010 01:14 PM

1 Attachment(s)
faster than a sloth :D:D:D
work in progress ;)

regal 5th May 2010 01:15 PM

The lack of galvanic isolation is an issue IMO, possibly enough to negate the benefit of forgoing SDPIF. Just know that Ayre uses optoisolators in their asynchrous USB DAC. I think we should push for it if we can.

GuidoR 5th May 2010 01:28 PM

Quote:

Originally Posted by regal (Post 2176501)
The lack of galvanic isolation is an issue IMO, possibly enough to negate the benefit of forgoing SDPIF. Just know that Ayre uses optoisolators in their asynchrous USB DAC. I think we should push for it if we can.

Ayre uses TAS1020 (Gordon Rankin/Wavelenght) that is limited to 24/96.
Back in this thread (#147) you'll find that it's impossible to galvanically isolate USB 2.0

regal 5th May 2010 01:37 PM

Quote:

Originally Posted by GuidoR (Post 2176513)
Ayre uses TAS1020 (Gordon Rankin/Wavelenght) that is limited to 24/96.
Back in this thread (#147) you'll find that it's impossible to galvanically isolate USB 2.0

Yes but who needs 24/192, better off limiting it to 24/96 and having a quality I2S, obviously Arye went for SQ over marketing specs, we push for the same IMO. No ones USB input beats the $2500 Ayre, this won't come close without the optoisolators.

merlin el mago 5th May 2010 02:09 PM

I own a hiFace, I'm interested, if I understand well is to extract I2S from hiFace, If yes I have several questions:

-Where will be connected, between the port USB & the hiFace?
-It's only a chip or is a finished product like the hiFace?
-I agree version 4 is the most flexible but can operate without external psu?


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