[audacity4blind] Re: control tracks
- From: David Bailes <david_bailes@xxxxxxxxxxx>
- To: "audacity4blind@xxxxxxxxxxxxx" <audacity4blind@xxxxxxxxxxxxx>
- Date: Sat, 1 Oct 2011 20:37:46 +0100 (BST)
Hi Brad,
these are some notes on Auto Duck which I posted a while back on this list, and
you may find useful.
The requirements of the Auto Duck effect are that:
1. The tracks whose volume is going to be reduced are selected, and a
time-range is selected to include all the audio you want to be modified.
2. The control track is the next track after the above tracks, and it isn't
selected.
So if you've got one music track and one narration track in the project:
1. Make sure that the music track is the first track. You can move tracks up
and down the table using the tracks context menu (application key).
2. Arrange for the music track to be selected and the narration track
unselected.
3. Select a time range to include all the audio in the selected track: press j,
and then shift + k.
4. Open the Auto Duck effect from the effects menu, and press Enter to press
the default OK button.
In fact the Auto Duck dialog contains a number of controls for setting various
parameters which you may want to adjust. All the time parameters are specified
in seconds, and the volumes in db.
1. The first control is a panel which graphically illustrates the parameters,
and you can just ignore this.
2. The duck amount is the reduction in volume.
3. The maximum pause is the maximum time that the volume in the control track
can be below the specified threshold before the volume in the selected tracks
is faded up again.
4. The time over which the volume in the selected tracks is faded down to the
reduced volume is made up of two parts: the time before and the time after the
time when the volume in the control track exceeds a threshold. These are known
as the outer and inner fade down lengths.
5. Similarly, there are outer and inner fade up lengths.
6. The threshold is the volume in the control track which if exceeded causes
the volume in the selected tracks to be reduced.
Note that whatever value of maximum pause is set, it is always at least the sum
of the outer fade down and fade up lengths.
Note also that Undo (ctrl+z), and redo (ctrl+y) are very useful when playing
around with effects.
----- Original Message -----
From: Brad Erhardt <bookmanbrad@xxxxxxx>
To: audacity4blind@xxxxxxxxxxxxx
Cc:
Sent: Saturday, 1 October 2011, 17:26
Subject: [audacity4blind] control tracks
Hello all once again,
I have one other question, but probably not my last question Smile. If I want
to use the autoduck effect I must have a control track, how do you make one of
your tracks a control track? Thanks,
Brad Erhardt
bookmanbrad@xxxxxxx
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