rounded notes for wind instrument

The playback of the oboe in musescore plays a note of fixed frequency/volume. However when you play the real instrument you often try to "round" the notes. This is especially true in baroque music. As far as I know there is no musical notation for this. My professor tells me to think of a ball bouncing, and try to make that sound.

The effect would sort of be to have a small crescendo/decrescendo on the note, or possibly the opposite, a decrescendo/crescendo, especially for short notes such as quarter notes or eight notes. Sometimes when playing the real instrument, I imagine playing two notes tied together but accented independently.

The reason I think it might be the sound font's responsibility is that some instruments such as piano do this automatically. There is an initial attack, and thereafter a fade.

In musescore would this effect be the responsibility of the sound font? Or would it be in the midi playback code, or is there an ornament I might attach to a note to get this effect?