First up:
s17.yousendit.com/d.aspx?id=11MA … IISD4O68EX
trick question, pozzibly? 
the topic is “guess the composer”, not “lurk in the topic and leave because you’re too scared of guessing wrong”. 
sounds like bach but more sheeyat.
definitely depuzzy
For organ?
Wuz tha instrument changed?
haha i was kidding lol
da humiliation.
No, and no. Keep guessing.
I know at least one member who should get this.
Da Mozart? 
WRONG. Keep guessing. Mozart is slightly closer than Bach. 
Soundz too thick for da Zart.
Can ve get a hint?
EDIT: nvm
da Haydn?
It’s mid-19th century.
Here was the first clue:
s12.yousendit.com/d.aspx?id=0KVH … UH7YPWA51C
Second clue, where the chorus theme re-enters at the end:
?
Warmer…but WRONG. 
Widor?
ah… tis a guess but da 
?
CORRECT. 
It is the great “Impromptu sur un Choral de Luther” opus 69 for pédalier or 3 piano hands by Charles-Valentin Alkan performed by Kevin Bowyer on organ.
It sounds totally whack on organ, but since it’s a virtually totally unknown masterpiece, it’s great to hear.
Here is the whole thing:
Whew, ah made it…
tis humiliatin’ fo to lose these contests de la histoire… twas still a guess, but an educated one… 