新特性[v1.2.4]1. In-App purchase lib patch2. enhanced GUI[v1.2.3]1.fixed wrong position of 'b' on staff[v1.2.2]1.fixed crash at low density device[v1.2.1]1.fixed not playing as stored2.added supported languages[v1.2]1.fixed not showing last screen when returning back2.fixed standard keyboard popup when entering rhythm edit3.fixed wrong character typed when editting rhythm pattern4.changed GUI5.removed midi volume in settings6.replaced musical images/icons with musical font