that noise is either a dead 2399, or more likely a damaged regulator. try replacing the 7809 and see if it goes away.
even then if you have a working 2399, it may just well crap out on you later...that happened to me.
i built rick holt's little angel, same issues even with the bug fixes, and i went thru 20 different 2399's from three different vendors....tayda, ebay (polida) and small bear.
i think it's just a crappy chip.
it seems from my experience, that once they lock up or overheat, they may still work, but they'll never work right.
at least one of the ones i have is damaged to the point of not passing audio.
the damaged ones tho, i guess you COULD use the opamps in them to make fuzzes or something.