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http://www.soundkonfusion.net/phpBB2/viewtopic.php?t=14724&highlight=side+chainI will be using a vsti synth for the audio part to be compressed, vsti drum machine for the sidechain and obviously a compressor plugin that supports sidechaining. This tutorial will be generic, just so you will know how to set up sidechain (I will be using the Waves C1 comp-sc so the settings for a different compressor may differ, consult its manual).
1) open a new (empty) project and move the right marker to measure 5 so you can have a 4 measure loop (enable loop mode on the transport)
2)add 2 midi tracks and a stereo group track.
3) place the synth as the midi out on the first midi track, and the drum machine on the second midi track (the synth patch should be able to play a constant note for the duration of the loop so it will be easier to hear the comp kicking in, and the drum machine should have a nice strong kick with a fast attack time).
4) draw in the midi for the 2 midi channels. The synth is going to be 1 continuous note that takes up the full 4 bars. The drums should only be the kick once per beat.
5) add the C1 comp-sc as an insert device on the group channel.
6) Now we start the routing. In the inspector, Set the output of the synth's AUDIO channel (not the midi channel) to the input of the group and set the pan to hard right.
7) For the drum's audio channel (again NOT the midi channel) put in a pre-fader send to the group (in the channel settings window). Make sure that the send is "on" and that the send level is raised to at least 0db. Now pan the send to hard left (the pan parameter is only visible on the send when in routing mode, found in the little black box at the top right of the channel settings window) We want this to be pre-fader so we can turn down this channel's fader and not change the send's level to the group (compressor).
8) play back the loop, if everything is set up correctly you should hear the synth on the right, the drums on both left and right (although slightly higher volume on the left ( now that it is going through 2 channels). If the group's fader is turned down all the way then the synth should not be heard and the kick (if mono) should be equal on both sides.
9) Now to set up the compressor. For "EQ mode" select "sidechain". For "key mode" select "L --> R" , this sets the kick as the sidechain key and the synth's signal as what is to be controlled by the key. For "monitor" select "sidechain". This will make it so you only hear the kick through the compressor. Now adjust the "threshold" and "ratio" so that there is about -12db on the "gain reduction meter". This is going to be the amount of compression applied to the synth's audio based on the level of the kick (sidechain key). Finally go back to "monitor" and select audio. Now you should be able to hear the synth played but with compression applied every time the kick sounds. Continue to adjusts the compressor's parameters to get the desired effect (ducking, pumping, etc..).
If you want to hear the synth only, then turn down the drum's audio channel fader all the way. Since the send on this channel is "pre-fader" it will not affect the amount of signal going to the compressor.
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- Load up a kick into channel 1.
- Load up a bass into channel 2.
- Create a group channel track (Group 1 until you rename it), open up the mixer, and add C1-sc on the last port of the groups inserts rack.
- Go to the kick on the mixer, and open the sends1-4 rack (as if you was going to enable a send effect). Click in the first port, and select Group 1. Make sure you've enabled the send, and then click the button next to enable - Pre-fader. Set the pre-fader to 0db. This will mean that the original unprocessed signal of the kick will be the key for the bass' compression, and no matter what level you adjust the kick, the bass will still compress the same.
- Now open up the kicks Channel Settings window - the little 'e' in the kicks mixer strip. From the Channel settings window of the kick, look near the top right corner and there will be a black drop down menu. Select 'routing'. Then pan the send of the kick (below it) to far left. Close the kicks Channel settings.
- From the main mixer window again, pan the bass far right, and then route the Output of the bass straight to Group 1. Now you should hear the bass coming only through the right speaker, while the kick comes through in stereo but far louder on the left.
- Go to the Group 1 channel on the mixer and open up the C1-sc. Select Key Mode 'L > R' and compress your bass how you want. I go for a ratio of 3.0:1, threshold at about -15 to -20, attack at 0.01ms and release at 50ms.
(now you should hear the bass being compressed, but still only coming through the right speaker, while the kick comes out in true stereo)
- On the main mixer, right click on the Group 1's panning and choose 'Stereo Dual Panner'. Two sets of panning should be there now. Take the pan from the right and bring it back centre (leave the left where it is). Bass should now be back where it's meant
JKP
