Learn how to quantize the musical scale of your MIDI input keyboard or drum pads using the Transposer MIDI plug-in in Logic Pro X.
For Logic Pro users the addition of the new MIDI plug-in devices in Logic Pro X is a welcome treat. One of the most useful aspects of this is the ability to quantize MIDI input notes to any given scale. This essentially means that when the plug-in is applied your musical input device, be it an external controller or using the Musical Typing Keyboard along with our ControlSkin, all of the notes you play will automatically quantized to notes in the selected scale. This is an important addition to Logic Pro X as it empowers producers more than ever to compose freely with only a small amount of musical theory experience. As long as you know the key you require and whether or not it is major or minor, you can start playing and composing freely.
In this tutorial we are going to reprogram the input notes from a standard chromatic concert input (piano style keyboard) to the A minor blues scale. The blues and pentatonic scales are great for composing and improvisation, however it is up to you which scales you would like to use in your own music.
In the track header, click on the instrument your would like to use to select it. In this example we are using a Rhodes style electric piano but you can use whatever you like.
In the corresponding channel strip, click on the area labelled MIDI FX and select Transposer from the drop down menu.
You should now see the interface for the Transposer MIDI plug-in. Click on the button labelled Root and select what key you would like your scale to quantize to from the drop down menu. The default is C and in this example we have changed it to A.
The final step is to select what kind of scale you would like your input device to conform to. To do this, click on the button labelled Scale and select the scale you desire form the drop down menu. In this example we have selected the Minor Blues scale.
Now if you play your MIDI note input device you will hear that it now conforms you your selected key and scale, and you can start jamming along with Robert Johnson!