[LAU] AVB on Linux
nando at ccrma.Stanford.EDU
Tue Jul 13 18:41:51 CEST 2021
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:
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).
> 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:
>> 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:
>> 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
More information about the Linux-audio-user