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did someone know this one ? and what about the company?
thanks..
Follow Ups:
"We are an online retailer located in Malaysia specializing in computer based audiophile solutions utilizing high quality Chinese made audio products."
Just to clarify. This USB audio mode still does have the master clock of the playback on the PC and the USB chip is using a software PLL to reconstruct the clock.This is different from async mode where the clock resides in the DAC and there is a secondary channel back to slave PC to that clock.
Cheers
thanks to clarify...
for newbies.
You can build a good USB Audio converters both ways.
However, for the highest possible quality you will want the master clock to be in the DAC.
Thomas,After doing testing for like 2 months having the master clock in the dac is not the answer.
The problem with async is that now you are so dependent on the following items:
1) Host Operating system.
2) Host USB Controller
3) USB controller port structure.... (i.e. single output to internal hub as compared to multiple direct connections).
4) Other USB devices on the chain.
5) Speed of the host processor.
6) Device layer driversI have 3 computers with XP on them and only one can deliver Async without burping and that is with custom drivers. I have 5 MAC machines and they work better but still not as good as in ISO mode again with custom drivers.
In general ISO has the highest priority of any device on the chain. Therefore the best thing to do is just make sure the dac side of things does it's best to provide a stable low jitter system on it's end.
Thanks
Gordon
Have you tried the built-in driver in XP and the updated verison in Vista?I have seen it work pretty well on all my machines. At least better than all other USB audio schemes.
The audio data delivery is still using an isochronous channel in async mode but you have an additional isochronous back channel that regulates the flow. This scheme reduces the likelhood of crackling and makes it more resistant to other devices on the same controller.
Your custom driver might be the problem. Try a Creative 2NX and don't install the custom river to play around with this.
Cheers
Gang,It looks pretty basic... I am surprised they used the Philips part it's not really that good and has been discontinued.
The idea of using the Crystal part is a good one if you put some kinda pll between them.
But really I guess for the price it can't be all that bad.
I guess the only way to learn is that someone pull the trigger and buy one for testing.The price is righ, especially on this side of the pond. (importing anything from Germany from Deade of DDAC fame cost a lot in shipping)
This gizmo looks better than stock M-Transit.
Concerns? Is there ASIO driver written for it or the only way is to use ASIO4ALL? My Waveterminal sounds way better with it's own ASIO driver than with ASIO4ALLWhat I would really like to see on this device is 5V DC in pin for the optional external power supply. They do not have to supply it at all. Adding a DC pin cost $0.20 but puts device in the entirelly new class.
External power, especially regulated linear DC makes a night and day difference - power via USB is simply not up to snuff. (Check hardware voltage in BIOS - 5V DC is usually 4.75v with fluctuation) It translates to unstable voltage from a noisy environment and the max. 1A.
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