M-VAVE on Instagram: "M-VAVE MK-20 AM4 New Year Preset Tone Import, Preview & Preset Introduction Effects Pedal: M-VAVE MK-20 MK-20 AM4 Preset Tone Demo & Preset Loading Tutorial and Introduction 1. MK-20 AM4 Preset Tone Demo 2. MK-20 AM4 Preset Tone Loading Tutorial 3.MK-20 AM4 Preset Introduction Note: 1. Before replacing sounds, you need to save the CAB, IR, and DS files. 2. 👉Restore all factory reset. This step is required for previous firmware versions to function properly. 3. The device w