You need good ears to create great music - that's the most important thing! So what about composer skills? Well sometimes - if not often - composers and producers today have limited knowledge of music theory. If you produce someone else's music or you made your own stuff, it's therefore not always certain that you know what chords are in the song.
Lets look at the Play Along Bass feature in Scarbee Funk Guitarist.
When you map and try different chords it is important that you are able to hear the bass/root note of the chord as this is often missing in the funk guitar style. This way you can use Scarbee Funk Guitarist as a great composer tool too, so that in any song you can have a bass play along as well.