20 Apr
2014
20 Apr
'14
5:53 p.m.
On 04/20/2014 05:35 PM, Len Ovens wrote:
On Sun, 20 Apr 2014, Jeremy Jongepier wrote:
Thanks! I was already familiar with that thread. I need to do some more
reading but so far I see a lot of assumptions, no solid proof.
On 04/19/2014 07:13 PM, Len Ovens wrote:
https://forums.presonus.com/posts/list/33427.page
except in USB3 ports on Intel USB3 ports which
are... broken at least
for low latency audio (Intel agrees).
No issues here on a notebook with Intel 3rd Gen Core processor (that's
Ivy Bridge right?) tech in it. My notebook at work with Haswell ULX tech
has no issues either. Could you ground your conclusion with relevant
articles? Is a good start. It has links to other resources as
well. This has
started to be an issue in linux starting with kernel 3.13 or so (at
least that is where I see the bug reports lp: #1308628, It could be
earlier as the reporter was using 3.2 before upgrade) when the USB3
driver xchi-hda shows up. (that seems to indicate to me that earlier
kernels do not support USB3)
http://cateee.net/lkddb/web-lkddb/USB_XHCI_HCD.html
So since 3.7.
Mother board manufactures may choose to use
other HW for their USB3 ports even with the ivy bridge
chip. This would
not affect USB1.1 audio stuff and may not affect all USB2 audio gear
either. It has affected both native instruments and presonus interfaces
though. In the windows world, it seems there have been driver changes to
fix this.
In all I know less than I would like. I do not have any USB2 audio gear,
or any USB3 ports. My take on the Intel possition is that once the chip
is out it can't really be fixed so call it "not a problem". Fix it in
the next version. A recall on chips that are soldered to the board is
even harder than just the pluggable cpu and it affects a very small
percentage of users. Even in the audio community USB2 audio device users
with no option but usb3 ports is small.
I guess I'm not the first and also not the only one who owns an Intel
based notebook with only USB3 ports. And in my case my USB2 audio
interface works very well.
Jeremy
--
Len Ovens
www.ovenwerks.net