This is a picture of how DTM (Desktop Music) works.
The right display is the DAW (Digital Audio Workstation) screen, which corresponds to the piano keyboard and inputs the basic behavior of the notes. The left display controls the sound quality of the various sound sources (piano, strings, etc.).iPad Prois inputting the display and memorization of sheet music. I use headphones to check the sound, and use the mouse instead of the keyboard. The screen shows the mixdown (exporting to audio file) of the beginning of "Beethoven Violin Sonata No. 9, "Kreutzer"" that I am currently working on.