Guitar Hero Engine - How?

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Vertigo
I agree with iPete - calibrate the guitar and whammy.
With GH2 and GH3 I have never noticed anythin "out of time" and each song is perfectly in synch.

However, I have also played about 4 of the Custom GH2 disks - in which pretty much EVERY song is out of synch or badly created so it is way out of time with the music.
Maybe you were playing a "Custom GH2"....?

iPete2:
That is the general idea I had for the music playback....if note hit then volume as per normal, if note missed then play a clunk sound and lower/higher the volume of playback progressively as the player hits/misses notes.

However - as I said, my head is really struggling with the concept of getting the stored info back displayed on the screen in time t the music.
ie. Example of stored info

Channel=1
NoteHit=1.565
NoteHeld=5.235

Channel=3
NoteHit=1.565
NoteHeld=5.235

etc etc etc...those times are in seconds.

So I know that I must hit Green and Yellow at 1.565secs into the song, and must hold them down for 5.235secs after I strum.

So...how do I make some sort of graphic (is it a plane?) scroll down the screen and when the music starts playing, 1.565secs into it my Red/Yellow gfx must scrll down the screen, in time with the music.

This is the biggest thing i dont get - what is being done to scroll at the correct time, what system, what exactly is happening?

Hope someone can help - my head hurts! :)