I'm currently mastering a Troy Stetina "Heavy Metal rhythm" course, but having troubles with one of the exercises. It has an "half arc pointed down" sybmol after a note on 12th fret, what does it mean? If it was pointed up, I would think that it is a bend, but on the mp3 file, that came along with a book, it sounds more like a long slide down. I just can't reproduce the sound, no matter what I do.
This is how it sounds:
How is this technique called and how do you play this? I would appreciate a link to youtube video with an example, if one exists.