
We will split the signal from the redrum into 2 audio outputs. That is where the audio merger/splitter comes in handy. To setup a sidechain compression we need to route the signal from instrument A (in my case a drum) from the instrument to the mixer and to the sidechain compression. This sidechain compression is sometimes handy when pieces become a bit crowded in a way, yet you want to push certain elements forward (in my example I am using a drum) but gently push the other instrument back (in my case I am going to use a 'pad' sound made with a subtractor). In the next video I will explain different set ups using side chain compression in Reason So in a way, instrument A determines wheather instrument B is being compressed. When instrument A is being triggered, instrument B will receive a compression signal (when it is being triggered depending on how sensitive the threshold is). With sidechain compression you send a audio signal from instrument A to instrument B.

As there are multiple ways to compress a sound there have also been other techniques that I will shed some light on (and also go more in depth about the whole multi band compression in the near future).
