TD-50: Are multi-effects (MFX) built in? June 04, 2023 07:22 Updated Follow Yes. You can choose from 30 types of MFX, and use up to three effects in each Kit. Related articles FP-10, FP-10-ACR: How do I restore the settings to the factory defaults? TD-50X: Multi-Effects (MFX) List How do I find/enter my Serial Number?