[ardour-dev] Gain automation twitchiness

[R Parker]

The twitching thing has been happening as long as I
can recall. It's a bit disconcerting to watch the
mixer and see all the movements but I also haven't
noticed the fade moves being printed to the exports.

ron

--- Joel White <cv223 at comcast.net> wrote:

> Twitching under automation also happens for me in
> beta22.  In this case, 
> I have a guitar track that is brought from  -7.4dB
> to -12.0dB during a 
> chorus.  During that chorus, the fader twitches to
> -7.4dB (which was the 
> gain on the track before I added the automation). 
> There is no twiching 
> during the parts of the song where the automation
> gain is -7.4dB.
> 
> Other observations about beta22 after about 5 min of
> use on a session 
> recorded under beta19:
> 
> - All my tracks are now panned center (good thing I
> didn't save it! 
> Panning is fine when I subsequently opened the
> session in beta19).
> 
> - For a sesssion that had about a 75% CPU load under
> beta19, the CPU 
> load is now about 45% (all the tracks and plugins
> still seem to be 
> active)!  Wow!  More headroom!  Fantastic!
> 
> Joel
> (thinking about all the extra tracks and plugins I
> can now run...)
> 
> Joel White wrote:
> 
> > I see the twitching fader using beta19.  I also
> haven't heard a 
> > problem, and there does seem to be some regularity
> to the twitch.  I 
> > just built beta22, so I'll see if it happens
> there.
> >
> > Joel
> >
> >
> > Mark Knecht wrote:
> >
> >> Joe,
> >>   I've seen this also. I'm on something earlier
> than beta22. What I
> >> see is the master fader jumping down to -inf and
> back to the proper
> >> level. I do not hear any problems so I assume
> that it's jsut a
> >> graphics problem.
> >>
> >>   It often also happen on my system in time with
> the music - i.e. -
> >> at beat 0 in a new bar. Don't ask me why. Go
> figure... ;-)
> >>
> >> - Mark
> >>
> >>
> >> On Wed, 22 Dec 2004 06:43:10 -0500, Joe Hartley
> <jh at brainiac.com> wrote:
> >>  
> >>
> >>> I have 2 tracks in a session that have gain
> automation on them.  I
> >>> noticed that beta22 introduced a "twitchiness"
> on playback/export.
> >>>
> >>> The levels will jump momentarily to levels they
> were never set to.
> >>> As an example, I have a vocal track set to
> -2.2dB for a certain
> >>> section of the song, and at -0.9dB for others. 
> The level jumps up
> >>> to zero once or twice a second in some parts of
> the song!
> >>>
> >>> There also seems to me some co-mingling of
> automation data.  I have
> >>> a gutar track that runs at -5.9dB for parts of
> the song, and I see
> >>> that level being jumped to by the vocal track. 
> The vocal track
> >>> ends up at that level every time, even though I
> just went and re-wrote
> >>> the gain automation, and it was set at -0.9dB at
> the end.
> >>>
> >>> This may have something to do with the
> mis-assignment of gain 
> >>> automation
> >>> data that I'd noticed and reported last night,
> when the vocal 
> >>> automation
> >>> got assigned to my master track.
> >>>
> >>> Here's a cut-n-paste of the automation file for
> the vocal submix.
> >>> There aren't nearly as many data points on here
> as there were 
> >>> "twitches".
> >>>
> >>> version 1
> >>> g 11264 1
> >>> g 157696 1
> >>> g 168960 0.902243
> >>> g 180224 0.799211
> >>> g 191488 0.722795
> >>> g 214016 0.722795
> >>> g 225280 0.799211
> >>> g 236544 0.799211
> >>> g 247808 0.741411
> >>> g 270336 0.741411
> >>> g 281600 0.779616
> >>> g 4595712 0.779616
> >>> g 4606976 0.799211
> >>> g 4618240 0.819139
> >>> g 4629504 0.839403
> >>> g 4640768 0.839403
> >>> g 4652032 0.860007
> >>> g 4663296 0.880952
> >>> g 4685824 0.880952
> >>> g 4697088 0.902243
> >>> g 6904832 0.902243
> >>>
> >>> -- 
> >>>
>
======================================================================
> >>>      Joe Hartley - UNIX/network Consultant -
> jh at brainiac.com
> >>> Without deviation from the norm, "progress" is
> not possible. - FZappa
> >>> _______________________________________________
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> >>> ardour-dev at lists.ardour.org
> >>>
>
http://lists.ardour.org/listinfo.cgi/ardour-dev-ardour.org
> >>>
> >>>   
> >>
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> >>
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> >>
> >>  
> >>
> >
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> >
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