I can offer you the following buffs, if you're below Lv. 91.
Horn Melody / Drum Melody / Pipe Organ Melody Guitar Melody / Harp Melody / Lute Melody / Prevailing Sonata / Daring Sonata / Refreshing Sonata
You can receive the above buffs as a group.
For Knight's Harmony / Warrior's Harmony / Wizard's Harmony, you will have to choose one.
"I want the Knight's Harmony." "Warrior's Harmony, please." "Wizard's Harmony, of course!"