| Switching on | Music plays at once (a grown-up can make it quiet). The volume knob is MASTER; the cap below holds it back. |
| The doors | HOME shows them: Play (3+), Make (6-8), Lab (9+), Games. A white key picks, the same key (or PLAY) opens. |
| Play | White keys sing, black keys drum. ALGORITHM a friend, PRESETS a style, SELECT the speed. FX: Surprise! |
| Make | Four layers (Beats, Bass, Tune, Sparkle), sixteen steps, recording in time, parts A-D into a song. |
| Lab | The real synth by its real names, a live scope, My Friends, and ten lessons (key 2 on its first screen). |
| Games | Six games and a sticker book. No timers for the youngest; nothing is ever taken away. |
| Help | Hold any button for a second: a card says what it does there. |
| Oops | EDIT undoes; held two seconds it clears (a ring fills first). Nothing is deleted with a tap. |
| Keeping songs | SAVE, then a white key: eight places. Songs, My Friends and stickers stay when it is off. |
| Grown-ups' page | Hold GLO and SAVE together for three seconds. SELECT moves, knob 1 changes, HOME closes. |
| For the youngest | Grown-ups' page: Doors shown: Play only. Then HOME does nothing and nobody gets lost. |
| Safety | A volume cap (default 70 %), a limiter that never lets the output past it, no squeals in Play and Make, flashes at most three a second (none with Lights: calm). |
| Bedtime | Sleep timer: the music stops and the screen dims after 5-30 minutes; pick the Lullaby style first. |
| Battery | Idle: the screen dims after 2 minutes untouched and the music stops after 10. |
| Stuck? | HOME always goes home. Update mode: hold OCT- and OCT+ for five seconds. The web installer can put it back. |
| Stickers | The sticker overlay (on this site) puts a picture on each button for children who don't read yet. |
BOP-1 is free software (GPL-3.0), independent of M-VAVE. The manual, the emulator and the installer are on its site.