[LAU] jdelay - measured latency of a usb interface

[Frank Barknecht]

Hallo,
Arnold Krille hat gesagt: // Arnold Krille wrote:
> I _seriously_ doubt that all usb devices have the same latency. Indeed they do 
> alls have the same latency introduced from the usb-protocol added to their 
> specific latency, but that specific latency still depends on the actual hardware 
> and the driver. And yes, there are different usb-audio drivers in the linux 
> kernel, just search for *usx2y* for example. And the hardware latency is 
> determined by the converters and the processing chip, just like with any other 
> sound device, be it pci, pcmcia or firewire based...
> 
> Have fun and excuse my nitpicking,

I'm no expert on this, but IMO ALSA-dev Clemens Ladisch is one. He wrote:

  "Due to how the USB protocol works, all USB audio devices have the same
  latency." 
  http://lalists.stanford.edu/lau/2005/06/0200.html

Ciao
-- 
Frank