In this in-depth Yamaha Motif-style walkthrough (using the Yamaha S90 as the example), I break down the core workflow so it stops looking intimidating and starts making sense. I start in Voice Mode—how to actually find sounds fast with Category Search, how the preset banks (PRE1/PRE2/PRE3/GM) work, and why those A/B/C/D group buttons are more than “storage.” I also show you the main Voice screen, what the function buttons (F1–F4) are doing, and the clean way to get back to your main display so you don’t get lost in menus. From there, I go into hands-on control: how the sliders behave in Voice Mode (pan, reverb, chorus, tempo, cutoff, resonance, attack/release, and basic EQ), plus the big “gotcha” that the physical slider position doesn’t reset when you switch functions. I also show an easier way to tweak ADSR using the EG page so you don’t confuse yourself mid-session. Then I cover portamento (mainly for synths), arpeggio basics (including hold), and how to trigger built-in drum/beat patterns from the Drums category. Finally, I hit Utility and MIDI: where transpose actually is, velocity curve options, effect bypass, power-on mode, input gain/AD source, master EQ, and the MIDI settings that matter—USB vs MIDI, thru, channels, and Local Control (the one setting that can make you think your keyboard is “dead”). I wrap by jumping into Performance Mode to show how I build a usable 4-part layer/split from scratch, manage levels properly, and avoid maxing out voices just because you can.