bells, buzzers, and whistles

[kamocat]

I'm currently using my cRIO as a test bench, as opposed to driving it around like an RC car.
I thought it'd be fun if it made a "ding" when it finishes a test. (a buzz or a beep would be fine too; some kind of distinct sound)

What's a good way to do this?
These are the options I see:

• wire something up to a solenoid output (requires the robot to be enabled)
• create a circuit to amplify a digital output and wire up a buzzer or beeper to that

I suppose if there's something over SPI or I2C, that could work as well. I'm using the RS232 port for CAN.