On 5/21/2015 12:58 PM, Aere Greenway wrote:
On 05/21/2015 10:04 AM, John Hupp wrote:
Running Audacious with JACK looks like it solves the dropout behavior
(though I have not tested it on the fat clients yet), but I see that
JACK and PulseAudio don't get along well together, especially on a
machine with only one sound device:
http://jackaudio.org/faq/pulseaudio_and_jack.html
So for a general-purpose desktop it looks like it would be much
better if I could get things working with PulseAudio.
John:
I use VLC a fair amount, and I have not yet encountered the
up-to-minutes-long dropouts of the problem reported.
When I don't have JACK running, I use VLC.
I use Audacious a lot, practicing improvising music along with audio
files, and I use JACK because my music software needs the low-latency
it provides.
I installed PulseAudio on my machines because the Java configuration
for (all) Ubuntu (variants) presumes PulseAudio is present (for the
Java Sound (Gervill) synthesizer).
On low-spec machines, the Java Sound Synthesizer won't work, but on
those same machines, Qsynth (using JACK) works fine.
I just thought about something that may be helping me
(configuration-wise) that you probably don't have.
In the "/etc/security/limits.d" directory, I have a file named
"aere.conf" (my user name is aere). Its name and contents are
user-name dependent. In my case, its contents are:
aere - rtprio 85
aere - memlock unlimited
I created this file at the suggestion of the Fluidsynth developers, to
allow Fluidsynth (Qsynth) to work on low-spec machines, and when I
made this configuration change, it made a major positive difference.
I don't know if it has any affect on the Audacious audio drop-outs,
but is permanently in my system.
The minutes-long dropouts only occur in VLC when it is run on a fat
client. It's A-OK on a standalone.
When I installed qjackctl, debconf popped up a question about whether I
wanted to set up realtime priority (involving /etc/security/limits.d),
but the help note said that it was a bad idea in a multi-user
environment because jack could monopolize all available physical memory
-- and a multi-user environment is what I have in this case.
Concerning your note that you installed PulseAudio: I recall that it was
not installed by default in earlier releases, but I think it is in 14.04
-- unless I picked it up as dependency for something else I installed.
Before I resort to one of the exercises to try to make JACK and
PulseAudio coexist, I would like to continue trying to make PulseAudio
work better. I return to the thought that VLC works fine on a
standalone without JACK, presumably using PulseAudio, though I suppose
it could be using ALSA directly. So I'm likewise hoping that Audacious
+ PulseAudio can work well for me on this hardware.
But just going a step farther into the JACK + PulseAudio scenario, do
you just run JACK manually as needed via qjackctl, or have you
implemented one of the coexistence options outlined at
http://jackaudio.org/faq/pulseaudio_and_jack.html?
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