Match every instrument. Bard easiest (chintziest) ornament event, it's fitting that the "special" ornament itself is just a shabbier version of enchanter animation sword. nice? no, enchanters got the sweet version two years ago on their vendored pet spell!
oh, a REAL basic "how"? "An Epic Request" Quest Giver: Lady Carolline of Thex (in Felwithe) repeat 3x. once for 2.0 ornament, once for 1.0 ornament, then you can do it once more for Song.
To get the final one, you need to do "An Epic Retelling", which is basically An Epic Request, but one detail added/changed/whatever. I have no clue about the Bard's epic ornamentation quest, but probably Brogh's first post contains a hint about what to do.
I see that bards can get a weapon with click in seb, any way to make it auto play or no way but click every 20 sec?
Oh how I wish this ornament had some little music note particle effects floating around it. Not necessarily the big blue ones of the old 1.0, but some smaller black ones would be perfect.
during the orchestra part in Dreadlands you will get emotes of the main npc hinting to which instrument he needs more of. you have a couple of seconds to equip that instrument ( instrument mods on armor do not work for this, you need actual instruments of each type). you need to get each one correct during the orchestra. This will give you a perfect retelling and you will gain access to "Song".