Interesting. Looks like this eval board includes its own DAC, unfortunately, when all we need is USB -> I2S. That's what made the M2Tech option attractive.
On the upside, I love that it works driverless on Mac. Proprietary software/drivers put us at the mercy of the manufacturer, which can lead to future incompatibiliy and early obsolescence. Thanks, audiodesign.
On the upside, I love that it works driverless on Mac. Proprietary software/drivers put us at the mercy of the manufacturer, which can lead to future incompatibiliy and early obsolescence. Thanks, audiodesign.
It looks like these are all using the new USB 2.0 standard. Compatible drivers are already included in the latest version of MacOS/X and (as soon as the standard will spread out on commercial devices...) will be included on just about every general purpose OS. It's time to push some developer to implement that on ALSA... 
I doubt they will. But in case, it would be MUCH better to have a setup which does NOT have any clock on board but rather accepts an external one (providing some line telling which of the two frequencies it should be).
This way one may connect whatever good local clock directly to the DAC and then send it back to the board. Using full isolation on all interconnections toward the USB interface (I2S, clock and required control lines) without impacting actual jitter on the DAC.
This is actually what we should aim for the best results.
Andrea,
This is great. Just 10 Euros for bare chip.
No need for ready made solutions, the rest we can DIY, probably better so anyway.
Then we can make all decisions ourselves -- what clock, what power supply, what DAC, .....
I personally think it is a better solution than M2tech.
Please keep us posted.
Patrick
This is great. Just 10 Euros for bare chip.
No need for ready made solutions, the rest we can DIY, probably better so anyway.
Then we can make all decisions ourselves -- what clock, what power supply, what DAC, .....
I personally think it is a better solution than M2tech.
Please keep us posted.
Patrick
I think we need at least to different chips. One is made by SMSC - USB transceiver, i think it may be any from the 883xxxx and 83xxx family, and microcontroller from XMOS. They do provide binaries for this reference implementation, but for our purpose it may/will be needed to develop our own firmware and thus driver... But if we will follow reference implementation, then maybe included firmware/drivers will do the trick.
Even cheaper at Digikey :
Digi-Key - 880-1002-ND (Manufacturer - XS1-L01A-TQ128-C4)
at USD7.40 per piece for quantities of 100.
Don't think we'll make the next price break at USD6.40 for 500.
Patrick
Digi-Key - 880-1002-ND (Manufacturer - XS1-L01A-TQ128-C4)
at USD7.40 per piece for quantities of 100.
Don't think we'll make the next price break at USD6.40 for 500.
Patrick
Hey, suddenly we are spoiled for choices :
http://www.diyaudio.com/forums/digi...w-usb-2-0-192-khz-24-bit-controller-chip.html
VIA Vinyl EnvyUSB 2.0 Audio Controller - VIA Technologies, Inc.
Probably a bit more difficult to get than ordering from Digikey.
Patrick
http://www.diyaudio.com/forums/digi...w-usb-2-0-192-khz-24-bit-controller-chip.html
VIA Vinyl EnvyUSB 2.0 Audio Controller - VIA Technologies, Inc.
Probably a bit more difficult to get than ordering from Digikey.
Patrick
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?
No problems.
It will be a lot of fund, especially we do chip only.
OK, we may need to buy one development kit as a group for re-engineering.
I vote for XMOS.
Great price, easy to get; fun for DIYing.....
The rest can be tailored to our needs.
What else do we want ?
Maybe we should open a new thread and see who is still in ?
Patrick
It will be a lot of fund, especially we do chip only.
OK, we may need to buy one development kit as a group for re-engineering.
I vote for XMOS.
Great price, easy to get; fun for DIYing.....
The rest can be tailored to our needs.
What else do we want ?
Maybe we should open a new thread and see who is still in ?
Patrick
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Vote for XMOS. What is more there are gerber files, BOM's etc. So we may order reference boards from external company. After evaluating one may design board which will fit to custom needs. Thier processors seems to be really good for such application and they provide lot of tools for development. For me this is the best choice.
ok, created the contact con Xmos in europe
I have sent the following request:
We should like to know the price of these 2 options:
1) buy about 150 item of your USB Audio boards to use like a USB to I2S at
192KHz 24bit
we need the driver for Mac and Windows XP and Linux if available
2) buy about 150 chips to integrate in a target pcb
we need also in this case the driver for Mac and Windows XP and
Linux if available
I have sent the following request:
We should like to know the price of these 2 options:
1) buy about 150 item of your USB Audio boards to use like a USB to I2S at
192KHz 24bit
we need the driver for Mac and Windows XP and Linux if available
2) buy about 150 chips to integrate in a target pcb
we need also in this case the driver for Mac and Windows XP and
Linux if available
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