how to properly kill the player so it doesn't respawn?

Hi.

I'm setting up mp3tofid+rsync again after many years and I remember being able to kill the player software so it doesn't respawn, then rsync, then launch the player software. I can't remember how I did this and searching the forum isn't turning up a whole lot except for other people having the same issue, like in this thread. Any ideas?

--Ajay

kill -2