Re: Automation woes
Re: Automation woes
- Subject: Re: Automation woes
- From: Stefan Gretscher <email@hidden>
- Date: Thu, 24 Jan 2008 07:43:55 -0800
Brian described very well why a plug-in needs to send begin/end in an
environment that implements "touch" mode automation such as Logic or
Pro Tools (but not GarageBand, for that matter).
Please implement this properly for all parameters that you're exposing
for automation in Logic.
Thanks,
Stefan
Am 24.01.2008 um 02:31 schrieb Eric Gorouben:
Hi,
There might be somehow a bug or a "feature" in Logic (express 7.2)
and pro 8.0 since there is no problem in Live 7 and GarageBand.
However, there must be a turnaround, otherwise no AU would work in
Logic!
Is there a way to test automation in AULab?
Eric
Le 24 janv. 08 à 08:56, Stephan M. Bernsee a écrit :
Hi Brian,
I agree with you 100%, although I don't see gestures and
interpolation as being unrelated (for the reason that I have
already stated, which btw. is also mentioned in an earlier
discussion about gestures on this list - gestures do help
interpreting the meaning of parameter value changes as being part
of a continuous path. And if you look at the behaviour you get from
Logic this appears to be exactly what they do).
In any event, the thing that I thought Eric seems to be struggling
with is that Logic 8 doesn't record parameter changes made through
AUParameterSet calls without an active gesture session. In an
earlier post on this list ("Cocoa AU template, AUParameterSet and
Logic automation") I was wondering if this is a bug in Logic
because I too was under the impression that gestures were be
optional, not mandatory. In practice, however, it turns out that in
Logic 8 gestures are indeed required in order to record parameter
automation events.
Since Eric is aware of this his problem must lie somewhere else.
I still stand by my opinion that it should not be necessary to
bracket each and every call to AUParameterSet with a gesture start/
end event - they wouldn't be very useful then.
Regards,
--smb
Am 24.01.2008 um 08:35 schrieb Brian Willoughby:
Interpolation is by no means the only useful thing to do with
gesture bracketing. For one thing, perhaps minor, Pro Tools
plugin API has a way to highlight controls that are being
controlled, so the begin gesture would draw the highlight and the
end gesture would remove it. More importantly, Logic and other
DAW software have multiple automation recording modes, some of
which erase old automation data whenever the user modifies a
parameter. Without the begin gesture and end gesture, there would
be no way for the automation system to know that it should erase
and update the automation value for the duration that someone
holds the mouse on a control, or otherwise holds a control at some
new value. Also, the final release of the mouse may come a very
long time after the last value change, but the automation system
must cease erasing old data and revert to the old automation value
as soon as the user "lets go" of the control - i.e. end gesture.
Interpolation is completely optional and rather unrelated to
gestures.
Brian Willoughby
Sound Consulting
On Jan 23, 2008, at 22:07, Stephan M. Bernsee wrote:
Am 24.01.2008 um 04:05 schrieb William Stewart:
On Jan 23, 2008, at 1:36 PM, Stephan M. Bernsee wrote:
Am 23.01.2008 um 22:24 schrieb Eric Gorouben:
No, I'm afraid not (not at the moment anyway). Except that you
should NOT bracket every parameter change by a begin/end
gesture event...!
But that wouldn't prevent the automation from working, it would
just cause the parameter values to jump instead of being
interpolated...
No - there's no implication from Begin/End gesture that there is
any interpolation... Setting a parameter is always going to be an
explicit "set the parameter to this value now" call. Its up to
the AU to dezipper the parameter change if it should be (that is,
you never want it to just jump internally because it would cause
a glitch or some such)...
Well, but of what use are the begin/end gesture events then, if
not to notify the host
that
any
AUParameterSet calls between them are to be interpreted as
sampled points along a continuous path?
--smb
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------------------------------------
Stefan Gretscher
plug-in development & 3rd party developer support
phone: (+49)-4101-495-586 (Central European Time)
AU developer support: email@hidden
TDM developer support: email@hidden
Apple GmbH
Geschäftsführung: Georges Guyon de Chemilly
Sitz der Gesellschaft: München
Amtsgericht München, HRB 66158
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