If the notes of the Aerophone Brisa do not change correctly or as expected, even when your fingering seems right, you may be unintentionally pressing the G# key, Roller key or another key.
Try playing slowly and carefully to confirm that the instrument is producing the correct notes.
Tips for checking your fingering
You can use the Fingering screen in the Aerophone Brisa Plus app (for iOS and Android) to check which keys are being pressed in real time. When you press a performance key on the instrument, the corresponding part lights up red on the app screen, making it easy to confirm whether any unintended keys are being touched.