Turn the key to right before the car starts (the gauges will illuminate), dont start the car.
turn the rev thingy once and you will hear a beep. Look to where it normally shows outside temp and it will give you a number, i.e. 60, 45, (meaning 6,000 rpm, 4,500 rpm respectivley) use the rev knobby thingy on the left and turn it to the right or the left to set the light (your rpm gauge will actually follow the number you are setting)..after 3 seconds or so of not touching it, it will set. Then it will go to the audible shift beep, and you have a choice of on or -- (off). I'm pretty sure this (the audible shift beep) was a "new" feature on the 05 STi's though mosc.
12.7 @ 109