24 Mar
2009
24 Mar
'09
10:11 a.m.
On Tue, Mar 24, 2009 at 01:18:37PM +0100, Frank Barknecht wrote:
Hallo,
Arnold Krille hat gesagt: // Arnold Krille wrote:
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
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