Originally Posted by Sandstorm2012
I'm in song mode and it's selected. But now what do I do with it?
In song mode, click once on a single clip once to select it, or Ctrl+click multiple clips, or use the select tool to draw a box and select multiple clips.
Then hit F8, set the transpose to -1 under "Pitch", then click apply. All of the clips selected will be transposed -1, the rest will be unaffected.