12 May
2006
12 May
'06
5:13 p.m.
Hi everyone
I'm having denormal problems with some LADSPA plugins, mainly the Triple
Band Parametric with Shelves, Plate Reverb and Glame High Pass filter
(which I started to use to replace that function in the Parametric).
They are really useful plugins but after a short space of time an
instance of one of them will start racking up thousands of Xruns and
processor usage climbs inexorably towards 100%.
I occasionally had problems before but it seems a lot worse since I
moved to DeMuDi 1.3 and the later version of Ardour that ships with it,
but it's probably just a case of selective memory.
Sampo suggested on the Ardour forum that I should try compiling the SWH
plugins using SSE instructions -- thanks for that. I got the latest tar
of the plugs and compiled them using those instructions but
unfortunately it hasn't cured the problem. Probably I did something
wrong -- I can't say I fully understood the options in the Readme.
Has anyone any advice on how to cure this problem, or any ideas where I
might have gone wrong compiling with SSE instructions? Preferably in
words of one syllable or fewer ;-)
I'm using a Pentium 4 if that makes any difference to anything.
Thanks in advance,
qb
12 May
12 May
6:29 p.m.
On Fri, 2006-05-12 at 20:13 +0100, Q wrote:
Sampo suggested on the Ardour forum that I should try
compiling the SWH
plugins using SSE instructions -- thanks for that. I got the latest tar
of the plugs and compiled them using those instructions but
unfortunately it hasn't cured the problem. Probably I did something
wrong -- I can't say I fully understood the options in the Readme.
Sorry to hear you're still having problems. Quick guide to compile the
plugins (assuming your setup is pretty standard, which it is, if you
haven't done something really weird).
tar xf swh-plugins-[version].tar.bz2
cd swh-plugins-[version]/
./configure --prefix=/usr --enable-sse
make
su
[enter your root password]
make install
exit
[the exit command drops out of the super user shell]
Then start ardour and try again. Swh's plugins include the "Triple band
parametric with shelves" and the glame butterworth filters, so you
should see if doing this will make these plugin work better.
Recompiling & installing swh plugins will not change how the plate
reverb you are using, as it's not part of swh plugins (it's part of the
caps set, most likely).
--
Sampo Savolainen <v2(a)iki.fi>
7:34 p.m.
Hi Sampo
Thanks for this. I noticed that I missed out one of the hyphens from the
"--prefix=/usr" bit. I compiled them exactly as you said (with the
correct number of hyphens this time) but I'm still getting problems with
an instance of the Triple Band.
The plate reverb I've been using says "by Steve Harris" in the titlebar
and there is a plate reverb listed in the SWH set.
Q
Sampo Savolainen wrote:
On Fri, 2006-05-12 at 20:13 +0100, Q wrote:
Sampo suggested on the Ardour forum that I should
try compiling the SWH
plugins using SSE instructions -- thanks for that. I got the latest tar
of the plugs and compiled them using those instructions but
unfortunately it hasn't cured the problem. Probably I did something
wrong -- I can't say I fully understood the options in the Readme.
Sorry to hear you're still having problems. Quick guide to compile the
plugins (assuming your setup is pretty standard, which it is, if you
haven't done something really weird).
tar xf swh-plugins-[version].tar.bz2
cd swh-plugins-[version]/
./configure --prefix=/usr --enable-sse
make
su
[enter your root password]
make install
exit
[the exit command drops out of the super user shell]
Then start ardour and try again. Swh's plugins include the "Triple band
parametric with shelves" and the glame butterworth filters, so you
should see if doing this will make these plugin work better.
Recompiling & installing swh plugins will not change how the plate
reverb you are using, as it's not part of swh plugins (it's part of the
caps set, most likely).
13 May
13 May
10:25 a.m.
On Friday 12 May 2006 20:13, Q was like:
I'm having denormal problems with some LADSPA
plugins, mainly the Triple
Band Parametric with Shelves, Plate Reverb and Glame High Pass filter
(which I started to use to replace that function in the Parametric).
They are really useful plugins but after a short space of time an
instance of one of them will start racking up thousands of Xruns and
processor usage climbs inexorably towards 100%.
I occasionally had problems before but it seems a lot worse since I
moved to DeMuDi 1.3 and the later version of Ardour that ships with it,
but it's probably just a case of selective memory.
Sampo suggested on the Ardour forum that I should try compiling the SWH
plugins using SSE instructions -- thanks for that. I got the latest tar
of the plugs and compiled them using those instructions but
unfortunately it hasn't cured the problem. Probably I did something
wrong -- I can't say I fully understood the options in the Readme.
Has anyone any advice on how to cure this problem, or any ideas where I
might have gone wrong compiling with SSE instructions? Preferably in
words of one syllable or fewer ;-)
I'm using a Pentium 4 if that makes any difference to anything.
I have had problems with the symptoms you're discussing, using the same set-up
and the stock demudi kernel (which is very old). I have had much more steady
CPU and DSP usage since I upgraded and recompiled my kernel to 2.6.16 - I
have been using the TAP plugins more than the SWH ones you mention. I will
test them out when I get a spare moment, as the only difference on my system
is likely to be the kernel and hardware.
--
cheers,
tim hall
http://glastonburymusic.org.uk/tim
We are the people We've been waiting for.
11:04 a.m.
tim hall wrote:
I have had problems with the symptoms you're discussing, using the
same set-up
and the stock demudi kernel (which is very old). I
have had much more steady
CPU and DSP usage since I upgraded and recompiled my kernel to 2.6.16 - I
have been using the TAP plugins more than the SWH ones you mention. I will
test them out when I get a spare moment, as the only difference on my system
is likely to be the kernel and hardware.
I did wonder about just trying to make do with other plugins, but the
Triple Band parametric is just so useful. I use it on just about every
track, both for the high pass and the EQ. I have just discovered the
4-band parametric, but I've had problems with the Glame High Pass where
I've tried using that.
How easy is it to recompile a kernel? Could it cause more problems than
it would solve? It sounds rather daunting for a newb like me. But on the
other hand, my mixing is grinding to a halt -- quite literally! Perhaps
I'll just get a load of tracking done until I find a solution.
Cheers
Q
11:45 a.m.
Saturday 13 May 2006 15:04, Q:
tim hall wrote:
I have had problems with the symptoms you're discussing, using the
same set-up
Does Ardour's Options -> Misc -> Stop plugins with transport setting make any
difference?
--
Wolfgang
and the stock demudi kernel (which is very old).
I have had much more
steady CPU and DSP usage since I upgraded and recompiled my kernel to
2.6.16 - I have been using the TAP plugins more than the SWH ones you
mention. I will test them out when I get a spare moment, as the only
difference on my system is likely to be the kernel and hardware.
I did wonder about just trying to make do with other plugins, but the
Triple Band parametric is just so useful. I use it on just about every
track, both for the high pass and the EQ. I have just discovered the
4-band parametric, but I've had problems with the Glame High Pass where
I've tried using that.
5:36 p.m.
Wolfgang Woehl wrote:
Does Ardour's Options -> Misc -> Stop
plugins with transport setting make any
difference?
Cheers, I think that might have made a difference -- there's certainly
no noise bubbling on the master channel when playback is stopped and
I've just managed to play a _really_ intensive track all the way through
without anything barfing.
Q
18 May
18 May
9:36 a.m.
On Sat, 13 May 2006 14:04:13 +0100
Q <qb(a)f2s.com> wrote:
How easy is it to recompile a kernel? Could it cause
more problems
than it would solve? It sounds rather daunting for a newb like me.
But on the other hand, my mixing is grinding to a halt -- quite
literally! Perhaps I'll just get a load of tracking done until I find
a solution.
If you want to recompile the kernel here is a complete
guide for demudi (it applies to debian too):
http://demudi.agnula.org/wiki/Low-latencyKernelBuildingHowto
There's also a sample .config file to start with. It's a bit time
consuming the first time, but I think it's feasible even for a
(motivated) newbye.
If something is not clear or you have any doubt report it to the demudi
mailing list and we'll help you, and fix the unclarities ;-).
Cheers,
~ Antonio
6614
days inactive
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days old
linux-audio-user@lists.linuxaudio.org
7 comments
5 participants
participants (5)
-
Antonino Ingargiola -
Q -
Sampo Savolainen -
tim hall -
Wolfgang Woehl