Options

Main Menu → Options holds every audio and display setting:

• Music / Metronome volume sliders.
• Input lag slider — manually nudges the same offset Calibrating Input Lag sets automatically; the results screen after a scored song also offers a one-click “apply the measured offset” shortcut if your timing consistently reads early or late.
• Microphone — a dropdown of every input device your system reports. A warning banner appears here (and nowhere else) if no working microphone is detected; see Troubleshooting.
• Harmonica model — pick which 3D harmonica model Play 3D and the Bending Trainer render, with a live rotating preview of each option.
• Pitch detect — which pitch-detection algorithm to use (FFT, YIN, pYIN, MPM, or NMF), each with a short explanation of its trade-offs shown alongside the picker. The default works well for most setups; switch algorithms here if pitch detection feels unreliable for your particular mic/harmonica combination.
• Note labels — swaps the up/down arrow on falling notes for the actual hole number, in both Play 2D and Play 3D.
• Adaptive Difficulty — off by default; turns on gradual note unlocking for every song (see Playing a Song). One setting shared by every song, not picked per song — the pause menu’s own toggle during a song changes this same setting.
• Theme — opens the theme picker.
• Calibrate input lag — opens input-lag calibration.

All Options settings persist to disk automatically and apply the moment you change them — there’s no separate “Apply” or “Save” step.