How bout you take your longest note, say a quarter note and define that up front, i.e., v=1/4. then fa is a quarter note, faa is an eighth note, faaa (it's exponential, not linear) is a sixteenth note. full stop gives you dotted rhythm, e.g., faa. is a dotted eighth note.

Thus: v=1/4

Do Do Do tii Doo Re fa mi do (The Caps indicate the higher octave)

Opening phrase of?