OK. I know nothing of instruments in which you blow. I admit this. However, I have surmised that keys that are flat are favored by musicians who excel in such instruments. This is some kind of jazz ... "maybe". And it is in the positively masochistic key of E-flat. On bass and guitar, I seriously doubt that this key has any relevance whatsoever. It is - in fact - a key that will torture your fingers beyond what any human can take if you - like me - do not re-tune your guitar and/or bass. The fingerings are wrong, awkward and painful. So, I post this in the vain hope that it will be a dream to play saxophone to.
As a personal favor to all jazz players, I have also thrown in at least one note that is hmmm "unexpected" (there are no wrong notes in jazz, I am told)