I was able to find the Shutdown audio file and replace it with a silent file. Now my Samsung Vibrant is quiet on shutdown. (some app always turns the system audio volume up to max . . this is common knowledge ) The shutdown file I replaced is /system/media/audio/ui/shutdown_128.ogg But I cannot find the Startup audio file. It still plays on startup. I have searched for all .ogg files from /root down and cannot find the startup jingle. Thanks.