[ardour-dev] Gain automation twitchiness
cv223 at comcast.net
Wed Dec 22 18:57:26 PST 2004
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!
(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.
> Mark Knecht wrote:
>> 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
>>> data that I'd noticed and reported last night, when the vocal
>>> 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
>>> 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
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