Changing Audio Pitch Dynamically

Hi guys,

I want to have an object that can be manipulated to change the pitch of a sound that is playing as it plays, and stay that way until the object is Transformed again.

I really just need to know if I'm generally on the right track with my logic here, and if my planned scripts and objects they will be attached to is correct, or if I need to learn other principles. I'd like to avoid getting into bad habits early on!

I'm still learning the different sorts of variables and functions in the scripting etc, but what I was thinking:

I think I'd need three types of objects with their own script each, to achieve what I want...? 1. When clicked, plays specified sound at specified pitch 2. Selects the sound 3. Sets the pitch

Really rough pseudo-scripting (if it can even be called that!) below:

Object 1. When clicked, plays sound at pitch

   play{ 
   the sound declared by Object 2 at the pitch declared in Object 3
   }

I'm guessing this object would also need an Update function to pull the variables from the other objects on every frame so it always knows what the pitch should be?

Object 2. When clicked, selects which sound to play I'm not sure on the types of variables to use here..

var object var sound

if gameObject(1){ the sound gets changed to 1 else if gameObject(2) the sound gets changed to 2 etc, etc, etc }

Object 3. When clicked and dragged, changes the pitch of the sound being played

var pitch float = 1.0

 When the user clicks and drags the object {
   Transform.Rotate around single axis and set the "pitch" variable to a 
   number relative to its original rotation. So, as it Rotates one way,
   it would increment, the other way, it would decrease, and store variable
 }

Thanks guys, I'd really appreciate your feedback/advice.

(Edit: I just realised a simplification of what I want to do. You know how on some keyboards (musical) you have that little pitch bend wheel? My Object2 would be one of many keys, Object3 would be the key on the keyboard choosing your note, and imagine the sound wont play until Object1 is clicked, rather than when Object2 is.)