As as an aveil for my father am I allowed to receive and/or send mishloach manos. Also, am I allowed to hear music on Purim if I eat the seuda by family like my children where groups come and sign and dance with music.
You may and should send Mishloach Manos. You should not receive Mishloach Manos, your family may be given the Mishloach Manos.
You may attend a seudah as in normal years. You should not participate in the dancing itself.
Shulchan Aruch O:C 696:6
Nimukei Orach Chaim 696:3, Pischei Tshuvah 696:4