14 Feb
2016
14 Feb
'16
7:17 p.m.
On Sun, 14 Feb 2016 18:19:49 +0100
Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote:
Now this might be the crucial point. rtirq is installed and the rtirq
was modified to exclude anything but the sound card
RTIRQ_NAME_LIST="snd_ice1712"
And then ./rtirq start was executed, as indicated in an advice here
and/or web page (sorry too many info at one time - can't complain
though ! :) and that is the important point.
By running 'rtirq start' the impression was given that there's no need
to reboot. Which gave:
% ./rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
87 FF 90 - 130 0.0 S irq/8-rtc0
547 FF 90 - 130 1.2 S irq/18-snd_ice1
After a reboot it is:
./rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
449 FF 90 - 130 0.7 S irq/18-snd_ice1
47 FF 50 - 90 0.0 S irq/9-acpi
The other thing that was done is to set all scaling_governors to
'performance'. Not so sure if this changed anything and I haven't
tested it yet. I have asked before about the scaling_governor since it
is always mentioned during an Ardour install and I was left under the
impression that I should not care about this.
So. After a reboot, the ardour session plays OK. There can be
a faint, very sparse crackling noise although no
'JackAudioDriver::ProcessGraphAsyncMaster: Process error'
reported by jackd in the console jackd was launched, with both the '-p
128 and --sync' options.
It is now quite good. I tried the setup with a few acoustic guitar
lines and it is no longer a fight to record something ! As is, it si
impressive. There may very well be some fine tunings to do. I would
also like to clean up the notes I have taken and post a summary of the
steps and a big thank you to everyone who helped !
Cheers.
Then follow Len's advices:
On Sat, 13 Feb 2016 17:04:45 -0800 (PST), Len Ovens
wrote:
>mv /etc/security/limits.d/audio.conf.disabled /etc/security/limits.d/audio.conf
The defaults of Ubuntu might differ to the settings
recommended here:
"@realtime - rtprio 99
@realtime - memlock unlimited" -
http://www.jackaudio.org/faq/linux_rt_config.html
Consider to edit the values to the above defaults,
resp. to
@audio - rtprio 99
@audio - memlock unlimited
This is fine since it is set at 95. memlock is also unlimited.
id
if there's no group (audio) shown, you need to add
the user to this
group.
This is also OK.
install rtirq.
As you are running a delta1010 (I think), sudo
edit /etc/default/rtirq... the line that says:
RTIRQ_NAME_LIST="something something"
to:
RTIRQ_NAME_LIST="snd_ice1712"
Reboot and after rebooting run