Hello Fernando,
Thank you for this information. Maybe my institution will be able to get
one of these interfaces to try out avb support. Maybe I can convince
them to get one, since it will also work on macos.
Brandon Hale
On 7/13/21 12:41 PM, Fernando Lopez-Lezcano wrote:
On 7/13/21 8:20 AM, Brandon Hale wrote:
Thanks so much for these links Fernando. I've played with the
OpenAvnu repo about 2 years ago, but I couldn't get it working as I
didn't know what I was doing. I'll try compiling it with the standard
Linux network stack and see how far I get.
I don't currently have a motu avb interface, but I do have access to
an RME Digiface AVB <https://www.rme-usa.com/digiface-avb.html>. I'll
look through those repositories, but I figure there's not much I can
do with that interface on Linux as of yet. :(
What interface do you use to get the 64 channels over usb?
There are several, at home I currently have an 8M and a 16A and I am
driving them through a patched kernel with the drumfix's driver
(caveat: the driver does NOT work with an RT patched kernel -
something to do with the number of interrupts generated and context
switches - but it works fine with a full preemption kernel with
threadirqs disabled), details in this thread:
https://linuxmusicians.com/viewtopic.php?f=6&t=18046&sid=5021bc427a7f0abd6b7a24c8aaef15d7&start=630
For a couple of our speaker arrays I have again used 16A and 8M mainly
as gateways into a larger array of Motus[*], but the 24ai and 24ao
also work. For these I am still running old firmware and the regular
usb driver in linux (newer Motu interfaces cannot be downgraded to old
enough firmware for the class compliant driver to work).
-- Fernando
[*] https://ccrma.stanford.edu/~nando/publications/stage_grail_2019.pdf
On 7/13/21 2:17 AM, Fernando Lopez-Lezcano wrote:
On 7/12/21 3:47 PM, Brandon Hale wrote:
Hello all,
Are there any of you here who are using AVB on Linux, especially
with a standard Ethernet port? What software or hardware are you
using to do this on your Linux machines? I am interested in playing
with it and have some AVB speakers to mess with, but I'm not sure
if it is even possible yet, especially with a standard laptop
Ethernet port.
Tell me about your Linux AVB success stories!
None yet... :-(
Regarding the use of i210 network interfaces, a while back I found
this:
https://github.com/AVnu/OpenAvnu/issues/601
----
At the top-level of the OpenAvnu checkout, run this make command:
$ PLATFORM_TOOLCHAIN=generic make avtp_pipeline
That will prevent it from linking to the i210 library and instead
use the standard Linux network stack. The packet launch times and
presentation timestamps will be
far less even and I'm working on ways to lessen those problems, but
you should be able to get a talker and listener built from the
avtp_pipeline code to work toge
ther with some tweaking of the avtp_pipeline INI files. Be sure to
read through the documentation that comes with the avtp_pipeline code.
----
But never had a chance to test it and see if it really works...
Then there is this software:
https://github.com/Drumfix/avb4linux.git
This is just 8 ports i/o on linux for motu avb cards, but it needs
an i210 NIC (by the same guy that posted an experimental driver for
proprietary usb mode on Motu's - in the LinuxMusicians forum - so
you can get 64 channel i/o over usb with the newest firmware - I am
using it and it works quite nicely).
-- Fernando
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