One last update:
I tried adding the device.description to the alsa-monitor.conf file like
this (see last line):
===========
{
# Rules for matching a device or node. It is an array of
# properties that all need to match the regexp. If any of the
# matches work, the actions are executed for the object.
matches = [
{
# This matches all cards. These are regular expressions
# so "." matches one character and ".*" matches
many.
device.name = "alsa_card.usb-MOTU_M4_M40000048603-00"
}
]
actions = {
# Actions can update properties on the matched object.
update-props = {
# Use ALSA-Card-Profile devices. They use UCM or
# the profile configuration to configure the device
# and mixer settings.
api.alsa.use-acp = false
# Use UCM instead of profile when available. Can be
# disabled to skip trying to use the UCM profile.
#api.alsa.use-ucm = true
# Don't use the hardware mixer for volume control. It
# will only use software volume. The mixer is still used
# to mute unused paths based on the selected port.
#api.alsa.soft-mixer = false
# Ignore decibel settings of the driver. Can be used to
# work around buggy drivers that report wrong values.
#api.alsa.ignore-dB = false
# The profile set to use for the device. Usually this
# "default.conf" but can be changed with a udev rule
# or here.
#device.profile-set = "profileset-name"
# The default active profile. Is by default set to "Off".
#device.profile = "default profile name"
# Automatically select the best profile. This is the
# highest priority available profile. This is disabled
# here and instead implemented in the session manager
# where it can save and load previous preferences.
api.acp.auto-profile = false
# Automatically switch to the highest priority available
# port. This is disabled here and implemented in the
# session manager instead.
api.acp.auto-port = false
# Other properties can be set here.
device.nick = "My Device"
device.description = "MOTU M4"
}
}
=============================================
and it worked!
Now in Carla and Ardour my MOTU M4 has the name "MOTU M4"
-Keith
On 4/30/21 9:11 AM, Keith Smith wrote:
UPDATE:
There's a thread on the pipewire issue tracker which is related to
setting alsa object properties:
https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/731
Fedora Jam 34 comes with pipewire utilities: pw-cli
This runs as a pipewire client object and within it typing 'help'
lists all of its commands
'list-objects' provides information on all the devices,nodes and
clients. I would use pw-cli instead of 'pactl list'
The pipewire /etc/pipewire/media-session.d/alsa-monitor.conf has a
device level setting to ALSA-Card-Profiles for devices which is set to
true. For pro-audio type interfaces that may result in the nodes being
identified as surround sound (FL, FR, RL, RR) {see: gitlab pipewire
issue 731}. I put in a rule to match to my pro-audio card and set
this property to 'False':
============================================
matches = [
{
# This matches all cards. These are regular expressions
# so "." matches one character and ".*" matches
many.
device.name = "alsa_card.usb-MOTU_M4_M40000048603-00"
}
]
actions = {
# Actions can update properties on the matched object.
update-props = {
# Use ALSA-Card-Profile devices. They use UCM or
# the profile configuration to configure the device
# and mixer settings.
api.alsa.use-acp = false
===============================================
Now in Carla, the pro-audio interface has a shorter name and the ports
are numbered instead of given surround sound positions.
This is closer to what I'd like, although I wish there was a way to
rename what shows up in Carla which appears to be its description text.
After making this change here is the source pipewire object from
pw-cli list-object:
id 49, type PipeWire:Interface:Node/3
object.path = "alsa:pcm:M4:0:capture"
factory.id = "18"
client.id = "31"
device.id = "43"
priority.session = "1808"
priority.driver = "1808"
node.description = "M Series"
node.name =
"alsa_input.usb-MOTU_M4_M40000048603-00.unknown"
node.nick = "My Node"
media.class = "Audio/Source"
In Carla the node.description, "M Series" is used to name the source
block (and also sink since I made a device level change). Same for
input names in Ardour
Note that I also changed node.nick, but neither Carla or Ardour uses it.
I hope this information is useful.
-Keith
On 4/29/21 9:49 PM, Keith Smith wrote:
> I'm pretty sure that I don't have JACK or Qjackctl on my upgraded
> fedora 34 system.
>
> Perhaps there is a way via some alsa subsystem approach to rename the
> sources and sinks. Carla and Ardour identify my MOTU M4 as a
> surround sound type system, which is incorrect.
>
> On Fri, 2021-04-30 at 00:29 -0300, Rafael Franco wrote:
>> Do you know that devices name can né renamed at qjackctl, i'm just
>> tweaking gere and found that, but I need to verify that these names
>> continue after restarting. I send news here.
>>
>> Em sex, 30 de abr de 2021 00:21, Keith Smith
>> <Keith(a)santabayanian.com <mailto:Keith@santabayanian.com>> escreveu:
>>> Something is happen with alsa-monitor.conf changes.
>>>
>>>
>>> The only property that makes a visible change is the
"audio.position"
>>> parameter and it only effects the suffix of the device port names.
>>>
>>> Changing the node.nick or device.nick doesn't seem to do anything
>>> as the
>>> device names in Carla's patchbay, or the listed inputs and outputs
>>> within Ardour are unchanged.
>>>
>>>
>>> However, My MOTU M4 audio interface source has nodes: capture_FR,
>>> capture_FL, capture_RR, capture_RL if I set:
>>>
>>> audio.position = "1,2,3,4"
>>>
>>> and restart pipewire
>>>
>>>
>>> Then those names change to: capture_1, capture_2, capture_3, capture_4
>>>
>>>
>>> so the match portion within alsa-monitor.config appears to be working.
>>>
>>> -Keith
>>>
>>>
>>> On 4/29/21 12:56 PM, Keith Smith wrote:
>>> > Pipewire seems to work great on my hardware. Already a big
>>> > improvement over JACK-Pulseaudio.
>>> >
>>> > When I open Carla's patchbay I see most of my hardware's source
and
>>> > sinks (at least all the one's I care about) However the names for
>>> the
>>> > ports are incorrect. I was reading about putting rules in
>>> pipewire's
>>> > alsa-monitor.conf file, but so far I have been unable to get that to
>>> > work (based on Carla's patchbay)
>>> >
>>> >
>>> > Has anyone successfully used alsa-monitor.conf rules to change a
>>> > device and its port names?
>>> >
>>> > I used 'pactl list' to get the reported device names and info.
Is
>>> that
>>> > the right command for pipewire?
>>> >
>>> > Thanks,
>>> >
>>> > Keith
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