Introduction to MIDI and Computer Music: Reason: Automating the Main Mixer
Mixer automation is the process of changing parameter values, such as volume and pan, during the course of a sequence. The changes can be instantaneous, gradual, or somewhere in between.
In any sequencer, there are two ways to automate a parameter: recording and drawing.
To quickly create automation data, it is sometimes easiest to record your knob-turning or fader-pulling action in real time. You can fine-tune this data later. This is a good way of doing it, because you can try out your moves while playing the sequence to hear the effect of the changes before recording them.
The steps below show how to automate a fader in the Main Mixer, but the procedure is the same for any knobs in the Main Mixer.
This creates in the Sequencer a track and lane for the Mix Channel device associate with this fader.
NOTE: This is different from automating synthesizer/sampler device parameters. These use lanes that are in the same sequencer track as the note lanes for that device. When you automate the mix for a device, that automation goes into a separate track.
When recording mix automation, be sure to select the track for the appropriate Mix Channel device, so that your automation changes will go into that track.
Notice that the automation lane has an Automation Lane On button (circled in red below). You can use this to suspend automation temporarily. If the button is off, the automation will not play back. Every track has a Record Enable Parameter Automation button (circled in purple below). This must be on (red) before you can record automation into the track.
If you simply want to draw some data without recording it, you can do that in the Sequencer.
Remember that holding down the command key lets you switch quickly between the arrow and pencil tools.
Here are some tips for editing automation data in the Sequencer.