Ultimate USB to I2S interface - Page 2

EUVL · 25th May 2010, 07:16 PM

I personally do not think isolation is so important.

As long as one uses completely separated power supplies for each chip (e.g. batteries for laptop, uP, clock, DAC, .....) and the ground is only connected from the preceeding stage to the following stage at a single point, and none or at most one of them to Earth, then ground noise is IMHO not an issue.

And for the solution we are looking at, this is entirely feasible. Only when you go for tube stage for an AD1865 would you really need a Tx based PSU, and even then the rest can still be battery powered.

Patrick

audiodesign · 26th May 2010, 12:00 PM

received now:

----- Original Message -----
From: "Sales - XMOS" <sales@xmos.com>
To: "Andrea Ciuffoli" <webmaster@audiodesignguide.com>
Sent: Wednesday, May 26, 2010 1:00 PM
Subject: RE: XMOS Contact

Hi Andrea,

My apologies for the delay in replying. The cost of 150pcs USB Audio Reference Design is $125.00 each and the lead time is 6-8 weeks.

Regards

Becky

audiodesign · 12:04 PM

I am still waiting the cost of the Xtremeusb solution.

Here a my temporary solution:

http://www.audiodesignguide.com/HiRe...404/index.html

EUVL · 26th May 2010, 06:08 PM

No mention of software availability from xmos ?

Patrick

BrianDonegan · 26th May 2010, 06:28 PM

Quote:

Originally Posted by EUVL

No mention of software availability from xmos ?

Well, licensing and pricing. The software is there.

sampler · 26th May 2010, 08:11 PM

Had a quick overview of xmos forum. Source code for this I2S reference design is available only by signing license of NDA. Had not seen any additional price mentioning. This should be considered from legal point of view. IMHO redistributing compiled binary files for non profit purposes, based on modified source should not be considered as violation of agreement, but this aspect should be not ignored before making any decision.

BrianDonegan · 26th May 2010, 08:46 PM

They will soon be announcing prices (per chip) for licensing.

EUVL · 26th May 2010, 08:58 PM

Pc -> Dac, How ?
http://www.xmos.com/discuss/viewtopi...&t=712&start=0

Sounds like we are 6 months behind with this thing anyway.
Maybe the other guys are already further ahead ??

Patrick

dggs · 26th May 2010, 10:14 PM

Quote:

They will soon be announcing prices (per chip) for licensing.

Confused.

Is XMOS a chip company or software company?
Making software/driver widely available should be a PROMOTION to their chips.

kenpeter · 26th May 2010, 10:46 PM

TAS1020B, the only one I ever use.

26th May 2010, 12:01 PM	#13
audiodesign diyAudio Member Join Date: Sep 2005	I am still waiting the cost of the Xtremeusb solution. Here a my temporary solution: http://www.audiodesignguide.com/HiRe...404/index.html Last edited by audiodesign; 26th May 2010 at 12:04 PM.

26th May 2010, 08:46 PM	#17
BrianDonegan diyAudio Member Join Date: Dec 2004 Location: Rock Ridge	They will soon be announcing prices (per chip) for licensing. __________________ Twisted Pear Audio

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25th May 2010, 07:16 PM	#11
EUVL diyAudio Member Join Date: Oct 2003	I personally do not think isolation is so important. As long as one uses completely separated power supplies for each chip (e.g. batteries for laptop, uP, clock, DAC, .....) and the ground is only connected from the preceeding stage to the following stage at a single point, and none or at most one of them to Earth, then ground noise is IMHO not an issue. And for the solution we are looking at, this is entirely feasible. Only when you go for tube stage for an AD1865 would you really need a Tx based PSU, and even then the rest can still be battery powered. Patrick

26th May 2010, 12:00 PM	#12
audiodesign diyAudio Member Join Date: Sep 2005	received now: ----- Original Message ----- From: "Sales - XMOS" <sales@xmos.com> To: "Andrea Ciuffoli" <webmaster@audiodesignguide.com> Sent: Wednesday, May 26, 2010 1:00 PM Subject: RE: XMOS Contact Hi Andrea, My apologies for the delay in replying. The cost of 150pcs USB Audio Reference Design is $125.00 each and the lead time is 6-8 weeks. Regards Becky

26th May 2010, 06:08 PM	#14
EUVL diyAudio Member Join Date: Oct 2003	No mention of software availability from xmos ? Patrick

26th May 2010, 08:11 PM	#16
sampler diyAudio Member Join Date: Jan 2010	Had a quick overview of xmos forum. Source code for this I2S reference design is available only by signing license of NDA. Had not seen any additional price mentioning. This should be considered from legal point of view. IMHO redistributing compiled binary files for non profit purposes, based on modified source should not be considered as violation of agreement, but this aspect should be not ignored before making any decision.

26th May 2010, 08:58 PM	#18
EUVL diyAudio Member Join Date: Oct 2003	Pc -> Dac, How ? http://www.xmos.com/discuss/viewtopi...&t=712&start=0 Sounds like we are 6 months behind with this thing anyway. Maybe the other guys are already further ahead ?? Patrick

26th May 2010, 10:46 PM	#20
kenpeter diyAudio Member Join Date: Nov 2007 Location: Dallas	TAS1020B, the only one I ever use.

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