The Kirby: Triple Deluxe Soundtrack became available through Club Nintendo of Japan on April 30, 2014 and through Club Nintendo of Europe and Australia on September 23, 2014. The CD contains 46 tracks from the game as well as three "Triple Bonus Tracks" at the end of the album.
I have yet to play Triple Deluxe, so I can't say that I'm familiar with the music(I'm sure I will be soon enough) but I noticed that virtually everywhere I've looked online, I haven't been able to find the album to download or a decent quality rip at least. I uploaded my copy at 320kbps and used the titles from the European release, crediting both Jun Ishikawa and Hirokazu Ando on the tracks they composed. I couldn't find exactly who wrote the bonus tracks 47-49 but I found a couple sources listing credit to Hal Laboratory, with no composer mentioned. While I would assume it would be either Hirokazu Ando or Jun Ishikawa, I can't find out for sure which one so I just labeled them together on those tracks. If you're in the market for a physical copy, it's becoming scarce but you can find a few on ebay going from $42-100.
Here are a few words from the director and composers from Kirby: Triple Deluxe found inside the CD booklet.