I have a Jackson guitar with a floyd rose.
Recently I have changed the tuning from C# standard to E standard which involved a lot of screwing of the springs which hold the floyd rose mechanism.
So after that and changing strings, a weird squealing noise started to appear when I strum the 5th string and then immediately mute it with my palm. An example of that is in the following SoundCloud link:
This also happens when the guitar is not connected to an amp and the other strings seem to be OK.
Does anyone know what's going on?