Hi all,
For a sound playback system I'm putting together, based on a Raspberry Pi 3,
I'm looking to have 4 channels of input and output, and to have the system
to run automatically at startup.
For this, I'm wondering how to (best) execute zita-a2j and zita-j2a; I've
tried two methods that don't work:
1. ask Qjackctl to execute the following script after startup:
sleep 5
zita-j2a -d hw:CODEC_1
2. execute this script:
qjackctl (with auto-start)
sleep 10
zita-j2a -d hw:CODEC_1
Executing the zita-j2a manually after Qjackctl has finished starting the
jack server does work.
Any pointers greatly appreciated!
Cheers, Steven
--
Sent from: http://linux-audio.4202.n7.nabble.com/linux-audio-user-f5.html
Fernando Lopez-Lezcano discussed the pitfalls of using the MOTU AVB
external audio interfaces with Linux in his paper [1] and also in the
keynote at LAC-19.
Let's start another thread around this card.
Fernando mentioned that different firmwares expose different issues, but
downgrading is possible. Issues are:
1. Channels are not persistent and swap around.
2. Total number of channels has been reduced in newer firmwares.
3. An endless card aquisition loop between Jack and Pulseaudio caused by
the long time the card needs to switch sampling rate.
4. Seemingly erratic behavior, opening the device fails, fails again,
again, then works suddenly.
I have a couple of questions and experiences.
Is there a table of the firmware versions somewhere (linuxaudio wiki?)
which tell me which versions has which features (removed)?
Are all the Class Compliant models having the same quirks as listed
above? For example the
MOTU UltraLite AVB versus the MOTU 624 AVB?
Is it possible to use the Thunderbolt port to connect the card to a
Linux computer?
Why can't I tell ALSA to use only the first 2, 4 whatever channels of
the device? I can only open the device if all channels are connected. Is
this always like that or is that a limitation of MOTU's implementation?
On my laptop with only one USB bus, If I connected the MOTU 624 AVB and
then another high speed usb device, the computer could not connect the
later, because the MOTU reserved all the bandwith for itself. Connecting
the other device and then the MOTU worked.
[1] http://lac.linuxaudio.org/2019/doc/lopez.pdf
Max
Hi everyone,
LAC is just a few days ahead now! If you can't make it to the conference,
we'll be video streaming paper presentations. Instructions on how this will
work can be found on the conference website:
https://lac.linuxaudio.org/2019/#streaming
Feel free to ask if you have any questions!
Cheers,
The LAC-19 Team
Hi,
I'm looking for a amp / speaker combination for keyboard. It should be
especially give good reproduction of piano sounds (using Pianoteq) and having a
solid bass floor. I have to fight 4 (non amplified) wind instruments (B.CL,
2xTb and Alto Sax) and a drum kit in our rehearsal room.
For I have to substitute partly a bass player it must be able to reproduce the
sound of the lower keys sufficiently. Price below 1000 € and and not too much
weight would be benefits.
I'm grateful for any hint.
Gerhard
Are there very many/any people using firewire devices?
If so is it with the alsa modules or the faddo modules?
My final question being how good are the alsa modules? do they cover most
of the FW devices out there? Or is removing alsa FW mod and using faddo
the way to go?
--
Len Ovens
www.ovenwerks.net
Hi list. Just continuing a thread I probably should have
started here instead of on Jack lists.
I was trying to say I was disappointed that apparently
a user had trouble with some hardware volumes.
So I lamented the lack of hardware controls in general
mixers these days. They used to show all ALSA controls.
I found a tip for KMix to show ALSA *not* Pulse controls:
"export KMIX_PULSEAUDIO_DISABLE=1 && kmix"
But unfortunately it's either Pulse or ALSA, not both at the
same time in KMix. To me that's a bad thing.
So I want to give a big shout out for QasMixer
https://sourceforge.net/projects/qastools/
and ask what general mixers you might use and what
you think of QasMixer and QasHctl. They're pretty cool.
They show all my ice1712 controls.
I think a desktop mixer icon should eventually bring you
to something like that instead of only Pulse.
What do you think?
Tim.
hi all,
just back home safe and waaay smoother than when getting there first :)
now,
for all the traditional and lousy unedited photos, straight out and
dumped from the camera sd-card:
https://www.rncbc.org/lac/lac2019
(note that the weather was lousy, cloudy and rainy...)
cheers and thanks for all the fish(*)
--
rncbc aka. Rui Nuno Capela
(*) ps. had none actually, there were only dead meat (and dead
vegetables too) but had it great on oysters on the last day, if seafood
counts as non-meat:)~
