Hi Daniel

Thanks for the response.

Regarding the  48 sample minimum, is there a reason why the Windows driver cannot go lower - or at least as low as the Mac driver  ?

I  *thought*  the Windows 7 audio architecture was now such that this would no longer be a limitation ?

Also - I cant seem to find the RME FFUC  .pdf  manual on the website (?)  can it be downloaded  (?)  if not, what is the size of the safety buffer for the FFUC (?)

Ben

Many thanks Knut - found the manual and USB info - I'll look better next time.

Whislt I dont [ yet ] have a FFUC and therefore cannot [ yet ]  actually run a CEntrance loop-back test, given what I have read, and given a Windows 7 environment, the minimum actual real-world-round-trip-latency then at  16/44  is going to be  ~ 4.7ms ..... being ....

=>  48 samples in + 48 samples out + 32 sample out safety buffer + AD Latecny + DA Latency = ~ 4.7ms

ie:  ~ 1.0ms + ~1.0ms + ~ 0.7ms + ~ 1.0ms + ~ 1.0ms = ~ 4.7ms

I presume the above is not going to be too-far off the mark  ?

Lastly  -  although 48 samples is the Windows limitation, could it not be an option in the Driver Control Panel to be allowed to toggle the 32 sample safety buffer on or off for those of us thar run  very  fast machines (?) ..... feasably, that  could reduce the latency by a further  ~0.7ms  thereby taking the RTL Latency to ~4.0ms which would be the same as the best  PCI or PCI-E cards running at 48 samples ?

Thanks,
ben

Hi Matthias

Thanks for the info - much appreciated.

Out of curiosity, if  ~4.7ms is the useable practical minimum for a fast Windows machine for a FFUC, what is the useable practical minimum for a fast MAC ?

[ ie: I had a quick look in the MAC Desktop compatability listing and couldnt see many there running sub-48 samples ]

Presumably, if they can run at 32 samples and with a smaller 28 sample safety buffer, my gues is their real-world RTL useable minimum is ~ 4.0ms ?

Thanks again,
ben