• Registered: 2010-07-30
  • Posts: 47

Topic: Is USB 3.0 still limited to a 1 ms block ?

Hi RME !

Just a quick  USB 3.0  question.

From previous info provided by RME,  the basic USB 2.0 design specification  is built in  1 ms blocks  -  hence the reason we cant get a working USB 2.0 Audio ASIO driver to work at 32 Samples is because  USB 2.0 simply  " wont go "  any lower than a 1 ms block

My question then is:-

=> does the USB 3.0  design specificaition also have this same  1 ms block  ?

or

=> will USB 3.0  [ combined with Native Windows 8 support ]  eventually allow for USB 3.0 drivers that can go as low as PCIe ?

Ben

  • Registered: 2008-06-26
  • Posts: 152

Re: Is USB 3.0 still limited to a 1 ms block ?

Hello Ben,

in this respect USB 3.0 does not differ from USB 2.0.
The advantage of USB 3.0 for audio applications is that you have more bandwidth, that means you can transfer more channels.
In real world applications you are lucky if you can achieve 128 or 64 sample buffersize. Default size of RME usb or firewire interfaces is 256 sample.

/Uwe