Sefirah and Lag Baomer – All you need to know

What’s the source of the proihbition of music? Is recordings, acapella and other forms of music forbidden?
Can you shave your beard? Can you make Shecheyanu?
Should you go to Meron this year or will it cause Chilul Shabbos? Does the pigrimage to Meron repair Charedi Chiloni relations?
What’s the real source of the Yom Tov of Lag Baomer?
A novel approach to the source of Lag Baomer