My Aria Mac 57/7 has a licensed Floyd Rose Tremolo.
Recently when I pick a note on the high E string on frets 12, 13 and 14, I hear a brief buzzing sound that appears to be coming from the tremolo/bridge. I'm sure it's coming from the tremolo area and not a result of fret buzz because if I hold the tremolo still, the buzzing stops.
I recorded the noise to give you an idea: http://cl.ly/1D0j283V1e0U2j2x443B
I can hear it when the guitar is not played through an amp and I think it doesn't have much affect on the guitars sound when it is played through an amp.
Could it be a loose/weak spring in the back of the guitar?