On Tue, Mar 24, 2009 at 01:18:37PM +0100, Frank Barknecht wrote: > 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 that statement is 4 years old. i doubt it holds. because the statement that USB cards require -n3 doesnt really hold anymore. so a lot of stuff changed. well... i am getting a few xruns with -p128 -n2 but this is nowhere near the xrun storms which were hapenning with 2.6.26.... -- torben Hohn http://galan.sourceforge.net -- The graphical Audio language _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
