(Shameless one-time call to participation to another S.E. site)
Many interesting physics questions are associated with musical instruments. Some fundamental physical concepts were born out of the investigation of sound, vibration, strings, tension.
One of the current questions relevant to physics in music.SE is this one
And it would be nice that more questions about the physics of instruments and instrument playing be asked and answered on the site.
I believe members from Physics.SE could valuably contribute to this new site, as physicists making this kind of questions and answers more precise and more informed and of course as musicians when this is the case, even as lurker.
As usual, Physics accounts holders with at least 200 points who create an associated account through OpenID on music.SE will have a 100 point starting bonus on the new site.
So you are welcome.