Legacy instruments in Logic Pro for Mac
The legacy instruments are less CPU- and memory-intensive versions of equivalent Logic Pro instruments. All legacy instruments feature a few carefully chosen parameters that provide maximum impact and flexibility, making it easy to create great sounds.
Legacy instruments are automatically loaded when you open a GarageBand project, a Logic Pro project, or a MainStage concert that uses one or more of these instruments.
You can use these plug-ins or you can replace them with other instrument plug-ins available in Logic Pro.
You cannot directly insert these plug-ins in Logic Pro unless you override the Instruments plug-in menu.
If you’re new to using plug-ins in Logic Pro, see Add, remove, move, and copy plug-ins in Logic Pro for Mac.
Display and insert legacy instrument plug-ins in Logic Pro
In Logic Pro, press Option, then click the Instrument slot on a channel strip.
The plug-in menu opens, with a Legacy submenu shown below Vintage Mellotron.
Choose the legacy instrument plug-in that you want to insert from the Legacy submenu.