In FL Studio, there are two plugins that we can use to create a robotic voice effect. How to Use Vocodex and Fruity Vocoder in FL Studio Recording and Mixing with Vocodex and Fruity Vocoder.Step 6: Additional Fruity Vocoder Signal Processing.Step 2: Set Up a Mic Input Modulator Mixer Track.Step 1: Add Fruity Vocoder to an Empty Mixer Track.How to Use Vocodex and Fruity Vocoder in FL Studio.