16 May
2007
16 May
'07
5:22 a.m.
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I've noticed a phenomenon many months ago: certain LADSPA plugins, when I enable them,
cause all audio to stop coming out of the effects chain.
This was a common problem with jack-rack. it got so annoying, I stopped using jack-rack.
The same plugins that would cause jack-rack to go silent, worked fine in Ardour. So I
started using Ardour (0.99) instead for effects.
Now, on a 64-bit dual-core Intel machine, I'm noticing the problem even in Ardour
(2.0.2). And in ecasound too, and jack-rack. If for example I add the TAP Rotary Speaker
plugin to any of Ardour2, jack-rack, or ecasound, all audio stops. If I remove the TAP
Rotary Speaker, audio is fine.
Why is this?
- -ken
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16 May
16 May
6:26 a.m.
Il giorno 16/mag/07, alle ore 09:22, Ken Restivo ha scritto:
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I've noticed a phenomenon many months ago: certain LADSPA plugins,
when I enable them, cause all audio to stop coming out of the
effects chain.
This was a common problem with jack-rack. it got so annoying, I
stopped using jack-rack. The same plugins that would cause jack-
rack to go silent, worked fine in Ardour. So I started using Ardour
(0.99) instead for effects.
Now, on a 64-bit dual-core Intel machine, I'm noticing the problem
even in Ardour (2.0.2). And in ecasound too, and jack-rack. If for
example I add the TAP Rotary Speaker plugin to any of Ardour2, jack-
rack, or ecasound, all audio stops. If I remove the TAP Rotary
Speaker, audio is fine.
Why is this?
- -ken
Have you noticed a heavy CPU load? In this case
this is a well known
(but unsolved) problem. Some plugins (TAP for sure) use some
instruction that cause abnormal CPU load on moder PC.
Take a look on the gray box at http://tap-plugins.sourceforge.net/
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9:12 p.m.
I have the same problem with the TAP plugins ad some other users have
reported too. It doesn't seem to be a problem with denormals since CPU
use remains low.
Hector
On 5/16/07, mAlessio <malessio(a)ale.it> wrote:
Il giorno 16/mag/07, alle ore 09:22, Ken Restivo ha scritto:
--
===============================
http://www.hcenteno.net
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I've noticed a phenomenon many months ago: certain LADSPA plugins,
when I enable them, cause all audio to stop coming out of the
effects chain.
This was a common problem with jack-rack. it got so annoying, I
stopped using jack-rack. The same plugins that would cause jack-
rack to go silent, worked fine in Ardour. So I started using Ardour
(0.99) instead for effects.
Now, on a 64-bit dual-core Intel machine, I'm noticing the problem
even in Ardour (2.0.2). And in ecasound too, and jack-rack. If for
example I add the TAP Rotary Speaker plugin to any of Ardour2, jack-
rack, or ecasound, all audio stops. If I remove the TAP Rotary
Speaker, audio is fine.
Why is this?
- -ken
Have you noticed a heavy CPU load? In this case
this is a well known
(but unsolved) problem. Some plugins (TAP for sure) use some
instruction that cause abnormal CPU load on moder PC.
Take a look on the gray box at http://tap-plugins.sourceforge.net/
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
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9:41 p.m.
======= On Thursday 17 May 2007, you wrote: =======
I have the same problem with the TAP plugins ad some
other users have
reported too. It doesn't seem to be a problem with denormals since CPU
use remains low.
Hector
On 5/16/07, mAlessio <malessio(a)ale.it> wrote:
>
> Il giorno 16/mag/07, alle ore 09:22, Ken Restivo ha scritto:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > I've noticed a phenomenon many months ago: certain LADSPA plugins,
> > when I enable them, cause all audio to stop coming out of the
> > effects chain.
> >
> > This was a common problem with jack-rack. it got so annoying, I
> > stopped using jack-rack. The same plugins that would cause jack-
> > rack to go silent, worked fine in Ardour. So I started using Ardour
> > (0.99) instead for effects.
> >
> > Now, on a 64-bit dual-core Intel machine, I'm noticing the problem
> > even in Ardour (2.0.2). And in ecasound too, and jack-rack. If for
> > example I add the TAP Rotary Speaker plugin to any of Ardour2, jack-
> > rack, or ecasound, all audio stops. If I remove the TAP Rotary
> > Speaker, audio is fine.
> >
> > Why is this?
> >
> > - -ken
Probably, it isn't interesting already, but I'm the next with the issue (Core 2
Duo,
Gentoo/~amd64). Have tried TAP Rotary Speaker just now. Aqualung and jack-rack were
used as hosts with the same effect - silence with almost zero CPU eating.
Andrew
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> > =Pxto
> > -----END PGP SIGNATURE-----
>
> Have you noticed a heavy CPU load? In this case this is a well known
> (but unsolved) problem. Some plugins (TAP for sure) use some
> instruction that cause abnormal CPU load on moder PC.
>
> Take a look on the gray box at http://tap-plugins.sourceforge.net/
> 
17 May
17 May
5:47 a.m.
On Wed, May 16, 2007 at 07:12:02PM -0400, Hector Centeno wrote:
I have the same problem with the TAP plugins ad some
other users have
reported too. It doesn't seem to be a problem with denormals since CPU
use remains low.
Even stranger here: yesterday I wanted to have look at what was happening
so I compiled the TAP reverb with floating point calculation. Result:
no reverb at all - just dry sound ...
--
FA
Follie! Follie! Delirio vano è questo !
16 May
16 May
9:58 p.m.
On Wed, 2007-05-16 at 00:22 -0700, Ken Restivo wrote:
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I've noticed a phenomenon many months ago: certain LADSPA plugins, when I enable
them, cause all audio to stop coming out of the effects chain.
This was a common problem with jack-rack. it got so annoying, I stopped using jack-rack.
The same plugins that would cause jack-rack to go silent, worked fine in Ardour. So I
started using Ardour (0.99) instead for effects.
Now, on a 64-bit dual-core Intel machine, I'm noticing the problem even in Ardour
(2.0.2). And in ecasound too, and jack-rack. If for example I add the TAP Rotary Speaker
plugin to any of Ardour2, jack-rack, or ecasound, all audio stops. If I remove the TAP
Rotary Speaker, audio is fine.
Why is this?
In Ardour have you noticed that output on the channel that has the
TAP plugin goes to ridiculous levels? This is happening for me when
using the CAPS EQ and TAP Reverberator or Stereo Echo. All output stops
until I mute the offending channel. I can usually remove the plugins,
reinsert them, and it will work fine for a while. The problem for me is
definitely NOT CPU usage. I've monitored that very closely. I have no
idea what's causing this but it is annoying.
Jan
--
Jan 'Evil Twin' Depner
http://myweb.cableone.net/eviltwin69
"Life should NOT be a journey to the grave with the intention of
arriving safely in an attractive and well preserved body, but rather to
skid in sideways, chardonnay in one hand, chocolate in the other, body
thoroughly used up, totally worn out, and screaming 'WOO HOO, what a ride'"
10:04 p.m.
On Wed, May 16, 2007 at 06:55:18PM -0500, Jan Depner wrote:
In Ardour have you noticed that output on the
channel that has the
TAP plugin goes to ridiculous levels? This is happening for me when
using the CAPS EQ and TAP Reverberator or Stereo Echo. All output stops
until I mute the offending channel. I can usually remove the plugins,
reinsert them, and it will work fine for a while. The problem for me is
definitely NOT CPU usage. I've monitored that very closely. I have no
idea what's causing this but it is annoying.
Yep, I've been seeing that problem for oh, must be years now.
--
Paul Winkler
http://www.slinkp.com
17 May
17 May
5:09 a.m.
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On Wed, May 16, 2007 at 08:04:25PM -0400, Paul Winkler wrote:
On Wed, May 16, 2007 at 06:55:18PM -0500, Jan Depner
wrote:
Hmm. Well, it sounds like at least some of the TAP plugins are simply not usable, at least
not on 64-bit machines.
Bummer.
- -ken
In Ardour have you noticed that output on the
channel that has the
TAP plugin goes to ridiculous levels? This is happening for me when
using the CAPS EQ and TAP Reverberator or Stereo Echo. All output stops
until I mute the offending channel. I can usually remove the plugins,
reinsert them, and it will work fine for a while. The problem for me is
definitely NOT CPU usage. I've monitored that very closely. I have no
idea what's causing this but it is annoying.
Yep, I've been seeing that problem for oh, must be years now.
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11:46 a.m.
On Thu, May 17, 2007 at 12:08:57AM -0700, Ken Restivo wrote:
On Wed, May 16, 2007 at 08:04:25PM -0400, Paul Winkler
wrote:
Yeah, but I've had the same symptom on 32-bit boxes too.
--
Paul Winkler
http://www.slinkp.com
On Wed, May 16, 2007 at 06:55:18PM -0500, Jan
Depner wrote:
Hmm. Well, it sounds like at least some of the TAP plugins are
simply not usable, at least not on 64-bit machines. Bummer. In Ardour have you noticed that output on the
channel that has the
TAP plugin goes to ridiculous levels? This is happening for me when
using the CAPS EQ and TAP Reverberator or Stereo Echo. All output stops
until I mute the offending channel. I can usually remove the plugins,
reinsert them, and it will work fine for a while. The problem for me is
definitely NOT CPU usage. I've monitored that very closely. I have no
idea what's causing this but it is annoying.
Yep, I've been seeing that problem for oh, must be years now.
8 Jun
8 Jun
1:43 p.m.
On 5/17/07, Paul Winkler <pw_lists(a)slinkp.com> wrote:
On Thu, May 17, 2007 at 12:08:57AM -0700, Ken Restivo
wrote:
Has anyone figured out a way to fix this problem, circumvent this
problem, or put up with this problem??
I'm trying to put together a Linux audio box for a friend (his
introduction to Linux) and it would be a real bummer if he can't use
any EQ...
Any suggestions?
-TimH
On Wed, May 16, 2007 at 08:04:25PM -0400, Paul
Winkler wrote:
Yeah, but I've had the same symptom on 32-bit boxes too.
On Wed, May 16, 2007 at 06:55:18PM -0500, Jan
Depner wrote:
Hmm. Well, it sounds like at least some of the TAP plugins are
simply not usable, at least not on 64-bit machines. Bummer. In Ardour have you noticed that output on the
channel that has the
TAP plugin goes to ridiculous levels? This is happening for me when
using the CAPS EQ and TAP Reverberator or Stereo Echo. All output stops
until I mute the offending channel. I can usually remove the plugins,
reinsert them, and it will work fine for a while. The problem for me is
definitely NOT CPU usage. I've monitored that very closely. I have no
idea what's causing this but it is annoying.
Yep, I've been seeing that problem for oh, must be years now.
2 p.m.
On Fri, Jun 08, 2007 at 08:43:52AM -0700, Tim Howard wrote:
Has anyone figured out a way to fix this problem,
circumvent this
problem, or put up with this problem??
I tried to look into it recently - compiled the TAP reverb in floating
point mode, but didn't get any reverb out of it at all, only direct sound.
There my trials ended as there was more urgent work...
I'm trying to put together a Linux audio box for a
friend (his
introduction to Linux) and it would be a real bummer if he can't use
any EQ...
You could use my FIL-plugins. There's only one in this set: a four-band
parametric, using Mitra-Regalia filters instead of biquads.
TAP uses biquads for everything, and I suspect that could be part of the
problem.
--
FA
Follie! Follie! Delirio vano è questo !
2:08 p.m.
On 6/8/07, Fons Adriaensen <fons(a)kokkinizita.net> wrote:
On Fri, Jun 08, 2007 at 08:43:52AM -0700, Tim Howard
wrote:
Thanks, Fons! I'll check out the FIL-plugins...
Incidentally, does the CAPS EQ also use biquads? Because it is
producing the same problems.
-TimH
Has anyone figured out a way to fix this problem,
circumvent this
problem, or put up with this problem??
I tried to look into it recently - compiled the TAP reverb in floating
point mode, but didn't get any reverb out of it at all, only direct sound.
There my trials ended as there was more urgent work...
I'm trying to put together a Linux audio box
for a friend (his
introduction to Linux) and it would be a real bummer if he can't use
any EQ...
You could use my FIL-plugins. There's only one in this set: a four-band
parametric, using Mitra-Regalia filters instead of biquads.
TAP uses biquads for everything, and I suspect that could be part of the
problem.
--
FA
Follie! Follie! Delirio vano è questo !
2:12 p.m.
On 6/8/07, Tim Howard <tdhoward(a)gmail.com> wrote:
On 6/8/07, Fons Adriaensen <fons(a)kokkinizita.net> wrote:
Hmm... I have been working on some seriously SSE´d versions of tap and swh
plugins and at least on my x86_64 tap reverb seems to work fine. I haven´t
actually published the last known working patches, but they are very small.
I will fiddle with the other tap plugins that appear to be causing problems.
I just started working on a Paris EQ clone, which looks quite similar to the
4 band parametric in FIL, but I´m using biquads. I didn´t know that FIL
plugins existed, I guess I should check ém out.
Thanks, Fons! I'll check out the FIL-plugins...
On Fri, Jun 08, 2007 at 08:43:52AM -0700, Tim
Howard wrote:
sound.
> There my trials ended as there was more urgent work...
>
> > I'm trying to put together a Linux audio box for a friend (his
> > introduction to Linux) and it would be a real bummer if he can't use
> > any EQ...
>
> You could use my FIL-plugins. There's only one in this set: a four-band
> parametric, using Mitra-Regalia filters instead of biquads.
>
> TAP uses biquads for everything, and I suspect that could be part of the
> problem.
>
> --
> FA
>
> Follie! Follie! Delirio vano è questo !
> Has anyone figured out a way to fix this problem,
circumvent this
problem, or put up with this problem??
I tried to look into it recently - compiled the TAP reverb in floating
point mode, but didn't get any reverb out of it at all, only direct
Incidentally, does the CAPS EQ also use biquads? Because it is
producing the same problems.
-TimH
_______________________________________________
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Linux-audio-user(a)lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
--
Mike Taht
PostCards From the Bleeding Edge
http://the-edge.blogspot.com
6:50 p.m.
On Fri, Jun 08, 2007 at 09:07:58AM -0700, Tim Howard wrote:
Incidentally, does the CAPS EQ also use biquads?
Because it is
producing the same problems.
I don't know what CAPS is using, and ATM I can't really blame
the biquads - I just have a feeling the problem could be hiding
there.
But using biquads in audio has some drawbacks:
- in particular for filters operating at LF, you can have
problems with numerical precision,
- they can get unstable when parameters values are modified.
This sort of thing happens often with the 'textbook' form of
a DSP algo, which is almost never the right one to use.
--
FA
Follie! Follie! Delirio vano è questo !
6167
days inactive
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linux-audio-user@lists.linuxaudio.org
13 comments
9 participants
participants (9)
-
Andrew Gaydenko -
Fons Adriaensen -
Hector Centeno -
Jan Depner -
Ken Restivo -
mAlessio -
Mike Taht -
Paul Winkler -
Tim Howard