Help Guitar Hero Style or similar

Hello , first of all do not speak English and this is translated with " Google Translator" .

My intention was to create a kind guitar hero game, there are several versions for PC , either , frets on fire , Phase shift , among others.

I have the progress of reading notes , because the notes are entered on a .midi , so what I did was to parse XML and already have the list of all notes with TimeStamp is in milliseconds and note color .

I do not know , it's like placing them on the screen, the speed of 480BPM notes are therefore My questions: How could happen that speed Unity , that the note to move at that speed ?

Second: How to locate the notes if you have them yas guardasd and have their value in milliseconds ?

Attentive to your comments and thank you very much