Let me first off lead by saying I am (or perhaps was) a rabid animal collective fan. I've seen them perform live before, and am familiar with their entire discography. This movie does little to provide an extra dimension to the animal collective 'experience' (and no, sadly, drugs don't seem to help much either) The visual experience of this movie is headache inducing, and it just keeps coming. Watching this, you quickly wonder how it became a full length movie project. Lots of quick cuts between disjointed scenes come together over heavy layers of visual effects and editing create a narrative that is impossible to follow. There are long stretches of this movie which play out similar to a winamp visualizer. There's never any attempt to explain the purpose of the visuals, and therein lies the conundrum of oddsac. The narrative isn't compelling enough to add up to anything, and the visuals simply aren't interesting enough to occupy a viewer for the running time.
As for the music, I'm lukewarm about it. It's a continuation of the musical direction taken with merriweather, which wasn't my favorite but there seem to be many who disagree with me. There's a whole lot of geologist tweaking knobs in this soundtrack, creating music that would sound more at home on warp than anything else animal collective has ever released. It's less pop-infused than merriweather however, more suited for a background situation than being blasted at a party. If you like that artistic direction, you won't be disappointed with the music of Oddsac.
My advice would be to simply close your eyes when this starts playing, or find a soundtrack later on if you're an animal collective fan. The visuals distract from any value that the soundtrack creates.