I'm just wondering what that soft does. A note - I'm a beginner piano player; I'm not looking to substitute real lessons with any soft, I'm just curious.
The software works in two ways. One is in real-time as you play it will play an accompaniment. This is great for an intermediate player but as a raw beginner you will NOT be able to play in time with a synthetic drum and bass part. But when you develop enough skill to play in time with a metronome then it might be fun to play with a drum and bass loop.
The other thing the software does is play a backing track where you control the cord progression with your left hand. For example you play a Dm chord and then the "band" will improvidse over the note in the D minor chord until you play the next cord. But you must keep time with e "band".
The other way the software works requires zero skill. It will write backing parts for you based on some music you type in. Say you rite a melody line or a chord progression. then you pick a style like "Polka" or "Rock" and then the software will improvise prts for en entire band using your chords and style.
You can also design you own styles.
The best use of this off-line mode of the software is for background music for home videos or DVD slide shows. It allows a semi-skilled wanta-be film score writter (like me) to make music that fits the timing of the video. Of course the result sound like a "band in a box" that is OK if the music is just incidental to the show and not the main product.
OK one more use. I did the above, trying to write my own music to back a DVD slide show but I found I basically "suck" as a composer. So I ripped off a dead guy. I figure Mr. Beethoven would not care to much if I stuff some of his theams into band in a box and have the software improvise pop band parts over bits of his melodies. Just give credit. Classical musicians would need to be issued barf bags but the general public will never recognise the source. And again the pictures are the main show.