I'm sorry for the naivete. Playing with the SX900 I came across two things that are not well specified in the manual, or at least, I have not found.
The first: by clicking four times on the tap / tempo button, you can set the tempo on the fly, this varies in relation with the cadence speed of the four consecutive presses. As a result, if you mentally sing the melody and follow the rhythm, the sx900, automatically, will set the perfect "time" of style.
The second: if you press endin II or III, twice in succession, the endig will be performed with the progressive slowing down of time.
This things many of you already know it ... but I was particularly impressed by these "hidden, but not too much" functions ... Is there any other "hot water" (...lol) that should I find out?