2001 Saturn Jump Started to odd effect

I recently left my lights on on my 2001 Saturn S series. (I also recently had a car stereo installed, don’t know if it’s relevant). I jumpstarted the car and now I get an odd chiming at startup. When I arm the alarm the arming honk is as loud as the alarm itself. It used to be a more modest honk. Any thoughts on what might have happened during the jumpstart or how I can correct these issues?

Try disconnecting the battery for 30 mins. Reconnect, then check on the odd sounds. Sometimes a hard reboot of the electronic modules helps.

Thanks Busted Knuckles. That seems to have cleared up both issues perfectly.