[RWP] Fading in reaper.

[Indigo]

Here's what the users guide says about ducking, using ReaComp:
snip:
- More REAPER Routing Examples
15.6 Audio Ducking
The next example will show you how to use
REAPER’s routing capabilities to create an
effect known as ducking. Put simply, this is a
term which describe what happens when a
compressor is set up to ensure that the
volume on one track is automatically lowered
whenever the volume on another track is
raised.
You might want to do this, for example, when
working with a kick and a bass. In this
example, we’ll use the Bouzouki, Guitar and
Vocal tracks in our sample project, just to
show you how it’s done. We will use audio
ducking to ensure that the overall volume of
the instruments are automatically lowered
slightly whenever there is a signal on the
Vocal track. This helps lift the vocal track
slightly above the mix. In order to do this, we
use multi channel routing in conjunction with
the ReaComp compressor.
This diagram (above right) illustrates the
concept of how we use sidechaining to achieve our ducking effect. Let’s 
take it step
by step.
Example
1. Open the project All Through The Night.RPP and save it as All Through 
The Night
DUCK.RPP.
2. If there are any tracks other than Gtr
Body, Gtr Neck, Vox and Bouzouki,
delete them, so that you are left with
just these four tracks. Adjust the
volume and pan faders of these tracks
to get a reasonable mix.
3. If necessary, change track order so that
Vox is Track 1, Gtr Body Track 2, Gtr
Neck Track 3 and Bouzouki Track 4.
4. In the Track Control Panel, select the
Vox track and press Ctrl T to insert a
new track after this. Name this new
track Instrument Submix.
5. Click on the Folder icon to make this
track a folder. Make the Bouzouki track
the last track in the folder.
6. We need to add two more channels to
the Instrument Submix so that it can receive a sidechain signal from the 
Vox. Right
click over the
Volume fader for this track, then set the number of channels to four, as 
shown here.
7. We now need to create a sidechain to enable the various instrument 
and Instrument
Submix track to
detect the signal level of the Vox track.
8. Drag and drop from the IO button on the Vox track to the IO button on 
the Instrument
submix. This will
create a send and open the controls window for that send. Accept the 
default send
type Post Fader, Post
Pan) and set the destination channels to 3/4 (as shown above).
9. Next, display the FX window for the Instrument Submix Track. Add the 
Cockos plug-in
VST: ReaComp
(Cockos).
Notice that this plug-in
includes an item called
Detector input. This is
where we tell REAPER that we
want the Vox level, not the
Bouzouki level to control when
the compressor kicks in. This
Detector input offers two
basic choices – Main Input
and Auxiliary Input.
11. We need to ensure that Main
Input is defined as the media
on the Submix track
(Channels 1 and 2), and
Auxiliary Input is defined as
the stream coming from the Vox track on Channels 3 and 4.
12. Click on the 4 In 2 Out button and if they are not already set,
set the assignments as Main Input L - Receive from Channel 1,
Main Input R - Receive from Channel 2, Auxiliary Input L –
Receive from Channel 3, and Auxiliary Input 4 – Receive from
Channel 4. These are as shown on the right: most probably these
will be the default settings.
13. Now display the Detector Input drop down list and select
Auxiliary Input L + R (right). This ensures that the
compression will be applied to the instrument mix in response to
changes in the volume (strength) of the incoming signal on
channels 3/4 from the vox track. When the volume of the vox
exceeds the threshold setting, the instrument mix will be
compressed.
14. Now play the song. Adjust the Threshold (first vertical
fader) downward, so that during Vocal passages the VU
meter peaks above the fader level.
15. Slide the Ratio fader right until you are satisfied with the
overall amount of reduction on the Instruments. This will
probably be somewhere between 4:1 and 6:1. Observe
the flashing red bar to the left of
the Output VU. This indicates the
amount of reduction that is
occurring on the submix track. In
the example shown, this is –3.9 db.
16. Save the file.
Shown are possible compressor settings
that might be appropriate in this case.
The trick is not to make the compression
too obvious, but to have it just squeezing
the peaks of instrument mix down a little
to make room for the vocal.
Tip: A quick way to create a sidechain
from one track to another is to drag and
drop from that track's IO button directly
to the window of the plug-in on the
receiving track.
290
15 - More REAPER Routing Examples
15.7 Double Ducking
This example should only be attempted after you have completed the 
example in the
previous section Audio
Ducking. It builds on the work you did there, to apply a further 
instance of sidechaining,
this time to the
Master. We will set up another instance of ReaComp, this time in the 
Master Track,
to ensure that another layer
of gentle compression is applied to the entire mix during the vocal 
passages. The
same audio stream is used to
apply ducking in two different ways – hence the term double ducking. As 
with many
of the other examples
included in this section, the main purpose of this example is to help 
you to understand
how to use REAPER’s
routing capabilities. The example itself is of secondary importance.
In the previous example, we used a send from the Vox track to Channels 3 
and 4 on
the Instrument Mix track
and then used these as Auxiliary Inputs to gently compress the 
Instrument Mix. Because
the Instrument Mix is
itself being routed to the Master, that Vox track send will 
automatically also be
sent to the Master on Channels 3
and 4. We can use this just to smooth out the mix a
little.
Example
1. Open the file All Through The Night DUCK.rpp
and save it as All Through The Night DOUBLE
DUCK.RPP.
2. In either the TCP or the MCP, select the Master
Track. Right-click on the Volume fader for the
Master and ensure that the number of Channels is
set to four. Close this window.
3. Display the FX Window for the Master Track and
insert ReaComp.
4. Open the pin connector window. As before, make sure that the 
Auxiliary Input L
is set to Channel 3 and
Auxiliary Input R is set to Channel 4. These should already be the 
default settings.
5. Set the Ratio to around 2.0
to 1.
6. Display the Detector Input
drop down list and select
Auxiliary Input L + R.
7. Play the song.
8. During the vocal passages,
adjust the left hand vertical
Threshold fader so that the
compression kicks in gently.
Raise the vertical Wet fader
by about a decibel or two.
9. Make sure that Limit Output
is selected. An example of
how your settings might look
is shown here.
10. That’s it! You can now save
your file.
These last couple of examples have introduced you to how you can use 
sidechaining
for ducking. You can use
sidechaining in conjunction with a number of other REAPER plug-ins, 
including ReaGate,
ReaXComp, ReaComp
and ReaFir.
End Snip.

On 4/4/2013 10:16 PM, Jim Snowbarger wrote:
> If you actually want the music to start fading down slowly, a second or
> two prior to the voice, aren't you into automation recording?   Or, I
> suppose you could feed the voice through a delay, with the compressor
> getting it's side chain information from before the delay, and the
> master mix receiving the output of the delay.
> I have no bloody idea how to set that up in Reaper.  But, I bet you can
> do it.
>
>
> ----- Original Message ----- From: "Indigo" <33indigo at charter.net>
> To: "Reapers Without Peepers" <rwp at reaaccess.com>
> Sent: Thursday, April 04, 2013 10:27 AM
> Subject: Re: [RWP] Fading in reaper.
>
>
>> I think what you need is side chaining on a compressor.
>> Basically, the compressor listens to your talking track; then raises
>> or lowers the volume of the music track according to the volume of
>> your talking track.
>> This is also called ducking, because the music ducks down in volume
>> when you talk.
>> You can set the compressor's threshold so it ducks the music instantly
>> or slowly, and set its gate so it lowers the music volume to silence;
>> or just reduces the volume.
>> Google cockos reaper sidechain and you'll get videos on how to set it
>> up, and if you google cockos reaper forums sidechain you can probably
>> find someone who has posted a template in the forums; to set it up.
>> Indi
>> On 4/3/2013 5:43 PM, Matt Turner wrote:
>>> hay there, is there a way to fade in reaper?
>>> I've got a voice track and i want to have music fade down, but still  be
>>> heard in the background while I'm talking.
>>>
>>> _______________________________________________
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>>> http://reaaccess.com/mailman/listinfo/rwp_reaaccess.com
>>
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