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Old 27th October 2010, 07:44 PM   #21
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Quote:
Originally Posted by ichiban View Post
Russ,
Have you considered incorporating an ADuM4160 USB Isolator as a front end?
I've used that ahead of a Musiland USB to SP/DIF into my SABRE and
noticed an improvement in sonics.
I looked into it briefly, but since it is limited to full speed it won't work for this application. I need high speed USB 2.0 to support the sample rates I want.

I have a much better plan for isolation. But I am not going to reveal it just yet.
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Old 27th October 2010, 07:59 PM   #22
ichiban is offline ichiban  United States
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Originally Posted by Russ White View Post
I looked into it briefly, but .............
I have a much better plan for isolation. But I am not going to reveal it just yet.

Excellent!
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Old 27th October 2010, 07:59 PM   #23
neb001 is offline neb001  United States
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I'm highly interested in your XMOS implementation, Russ. Looking forward to it!


If you need any beta testers, feel free to contact me
 
Old 27th October 2010, 09:26 PM   #24
glt is offline glt  United States
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Will it have i2c?
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Old 27th October 2010, 11:22 PM   #25
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Originally Posted by glt View Post
Will it have i2c?
Do you want it to...?
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Old 28th October 2010, 06:23 AM   #26
orpheus is offline orpheus  United States
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First I want to thank you for sharing your work with all of us, I enjoy listening to my Buffalo II.

I looked at the XMOS website, and have a small request that you might consider.

Would it be possible to have a female USB input on the module, instead of male, so that the USB cable can be plugged into the DAC chassis with no intermediary S/PDIF or CAT cable?

You might already be intending to design the module this way, since you are going to have i2s output, but I thought I would ask. It doesn't make sense to me that the M2Tech and other modules are designed so that the conversion to S/PDIF takes place next to the computer, and then S/PDIF carries the signal to the DAC, when the USB cable would be a better choice to run all the way to the DAC, and then have very short connections to the DAC from the module.

Thank you again for sharing your work, I would not be able to afford digital with the sound quality and flexibility (DSD!) I get with the Buffalo DAC if not for Twisted Pear Audio.

Best,
Aaron.
 
Old 28th October 2010, 01:56 PM   #27
glt is offline glt  United States
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Do you want it to...?
I don't know... maybe read information such as sampling rate? or select a song from the usb stick? :-)
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Last edited by glt; 28th October 2010 at 02:07 PM.
 
Old 28th October 2010, 05:26 PM   #28
LeonvB is offline LeonvB  Netherlands
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Quote:
Would it be possible to have a female USB input on the module
Actually I would prefer an off-board connector, so the user can select their prefered mounting type/method and no board would need to be replaced when the USB port is damaged. Also mounting it into a case gets much easier as you could simply drill a round hole for fi. a Neutrik USB connector.
Quote:
I don't know... maybe read information such as sampling rate? or select a song from the usb stick?
I don't see the use of this: it's USB using a processor, but I doubt it'll be a full blown embedded computer board. Reading sample rate and selecting a song would require a display, user input, directory browsing capability, etc. which is easier to do with fi. an embedded PC board.
 
Old 28th October 2010, 08:10 PM   #29
Gluca is offline Gluca  Italy
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+1 LeonvB
 
Old 28th October 2010, 08:40 PM   #30
glt is offline glt  United States
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Originally Posted by LeonvB View Post

I don't see the use of this: it's USB using a processor, but I doubt it'll be a full blown embedded computer board. Reading sample rate and selecting a song would require a display, user input, directory browsing capability, etc. which is easier to do with fi. an embedded PC board.
A small microprocessor such as Arduino would be enough. But if you want to talk to the board, you will need i2c.

Russ said in post #8

"For now I have played signals up to 384khz directly from USB storage. But, I have not perfected this yet.

My hope is to be able to make the board work both as a host controller with USB storage and as a USB audio device. We shall see..."
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Last edited by glt; 28th October 2010 at 08:44 PM.
 

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