guitarix LV2

[autostatic]

Some observations:

• is it correct that the Cabinet and Presence settings do not affect the sound?
• In Qtractor I can't use panning on a track that contains a GxAmplifier plugin. If I do so the output becomes silent when I pan completely to the left or right. Also when I set the panning back to 0 again I get a huge amount of xruns.
• In Qtractor I get a lot of xruns when making connections from/to the buses to which I routed the output of the tracks containing a GxAmplifier plugin.

[funkmuscle]

hey Jeremy, Hermann I think knows about the cabinet and presence knobs. He told me he'll be fixing that in January as he's away for work.

Harv

[autostatic]

Ok thanks Harv!

[brummer]

Some observations:

• is it correct that the Cabinet and Presence settings do not affect the sound?

No, it's a bug , hopeful it's fixed now

[*]In Qtractor I can't use panning on a track that contains a GxAmplifier plugin. If I do so the output becomes silent when I pan completely to the left or right. Also when I set the panning back to 0 again I get a huge amount of xruns.
[*]In Qtractor I get a lot of xruns when making connections from/to the buses to which I routed the output of the tracks containing a GxAmplifier plugin.[/list]

Seems to be a denormal problem, please use the --optimization configure flag.
minimal requirement are the cxxflags -msse -mfpmath=sse to enable denormal protection via _MM_SET_FLUSH_ZERO_MODE()

[autostatic]

minimal requirement are the cxxflags -msse -mfpmath=sse to enable denormal protection via _MM_SET_FLUSH_ZERO_MODE()

Can I use the --cxxflags configure option for that? Or is it better to set it in the wscript file?

[brummer]

Can I use the --cxxflags configure option for that?

Yes, sure, those flags are welcome by guitarix standalone as well. Use it like this

Code: Select all

 --cxxflags=' -msse -mfpmath=sse '

there are still some more cxxflags which I would recommend to use,

Code: Select all

 -fomit-frame-pointer -ftree-loop-linear -ffinite-math-only -fno-math-errno -fno-signed-zeros -fstrength-reduce -pipe

[autostatic]

Xruns are gone when using the optimization flag. Cabinet and Presence still not working though

[brummer]

Cabinet and Presence still not working though

I'm pretty sure you missed my last push [399b63], in fact I push the fix a bit later the I have posted here.

[autostatic]

Just did a git pull but still no dice on the presence and cabinet settings. I'm using Qtractor from svn.

[brummer]

hm, now I'm confused, I use qtractor-svn as well here, and cabinet and presence work well here.
Have you enabled the debug flag in qtractor ( --enable-debug) maybe then you get some useful output from the Gxamps if something went bad?
Indeed, there is no influence of the cabinet and preset controllers on the sound? I cant believe that this should be a 32bit versus 64bit thingy again

One thing comes in my mind, I have set the convolver prio to SCHED_FIFO, maybe that isn't allowed on your PC?
You can try to set it to 0, in gxamp.cpp line 246 and line 251, replace
if(!cabconv->start(0, SCHED_FIFO))
with
if(!cabconv->start(0, 0))
and
if(!ampconv->start(0, SCHED_FIFO))
with
if(!ampconv->start(0, 0))

duno if that will help, I'm a bit surprised that it didn't work for you, so I have to think about it for a while

[autostatic]

hm, now I'm confused, I use qtractor-svn as well here, and cabinet and presence work well here.
Have you enabled the debug flag in qtractor ( --enable-debug) maybe then you get some useful output from the Gxamps if something went bad?

It's disabled, I generally don't use debug enabled builds. I'll build Qtractor with debugging enabled to verify what's happening

Indeed, there is no influence of the cabinet and preset controllers on the sound? I cant believe that this should be a 32bit versus 64bit thingy again

I'm running Ubuntu 12.04 64-bit.

One thing comes in my mind, I have set the convolver prio to SCHED_FIFO, maybe that isn't allowed on your PC?

I'm using a realtime kernel so that shouldn't be an issue?

[brummer]

hm, now I'm confused, I use qtractor-svn as well here, and cabinet and presence work well here.
Have you enabled the debug flag in qtractor ( --enable-debug) maybe then you get some useful output from the Gxamps if something went bad?

It's disabled, I generally don't use debug enabled builds. I'll build Qtractor with debugging enabled to verify what's happening

Well, me to, but for development purpose I've enabled it. Output from gxamps you will only get in the terminal, not in the qtractor message box, but indeed only if qtractor is build with the --enable-debug flag.

[funkmuscle]

just did the latest pull of guitatix and still no cab or presence on Ardour3 or the latest qtractor-svn.

[brummer]

I'm running Ubuntu 12.04 64-bit.

For the case it is really a 64bit thingy I have replace all int and unsigned int definitions by (u)int32_t Type definitions now, . . .
Harvey, you use also 64bit if I remember right,

[funkmuscle]

yep, Arch64