-According to the psak of R’ Moshe Feinstein and others, one may make a wedding before Rosh Chodesh Iyar, or after Lag Ba’omer, and invite guests who may be keeping sefirah at that time, and they may participate in the dancing with music.
Igros Moshe OC 1:159, 2:95, EH 1:97, Piskei Tshuvos 493:5,13
-Before Rosh Chodesh Iyar and from Lag Ba’omer on, one may be lenient and rely upon the opinions of the Poskim who permit music at a Seudas Mitzvah.
Shulchan Aruch w/Mishnah Brurah 493:1, Piskei Tshuvos 493:5{[email protected]/Matzav.com Newscenter}
