These are typically used for "Send/Return" effects like Reverb and Delay. They have dedicated return channels built-in, allowing you to bring the processed signal back into your mix without using up standard input channels. Slots 5–8 (Insert Effects):
The effects engine provides various types of processing, from classic emulations to modern utility tools. HOW TO SETUP EFFECTS ON BEHRINGER X32 | MIDAS M32 X32 effects presets
Lead Vocal — Plate Vocal