Sounds question. Need help desperately.

[DHarvey]

I recently reflashed my ROM and before, the sound made when I tapped the end button(red button) was a real short low toned beep. Now a really high pitched longer sound is played every time I tap the End Call Button.

Does anyone know what the sound file is called that is related to the red phone button?

I would like to just make it silent.

Thanks in advance, Dan.