As you consider what types of MUSIC you can send your missionary, may I offer the guidelines from the White Missionary Handbook (p 25-6):
“Listen only to music that is consistent with the sacred spirit of your calling. Music should invite the Spirit, help you focus on the work, and direct your thoughts and feelings to the Savior. Do not listen to music that pulls your thoughts away from your work, merely entertains, has romantic lyrics or overtones, or dulls your spiritual sensitivity by its tempo, beat, loudness, lyrics, or intensity. Listening to music must never interfere with your personal preparation or proselyting.”
Thanks, family and friends of our missionaries!