Changing the parameter-

Things that effect the volume either-
Makes the ocarina Louder (can also just be for the top/bottom of range)
Makes the ocarina Quieter (can also just be for the top/bottom of range)

Things that effect the pitch position-
Makes the ocarina higher pinched (range stays the same)
Makes the ocarina lower pitched (range stays the same)

Things that effect the pitch range-
Makes the ocarina have less of a range (pitch position stays the same)
Makes the ocarina have more of a range (pitch position stays the same)

Things that effect the timbre-
Makes the ocarina breathier
Makes the ocarina clearer