Check out drummer Peter Erskine's remarks on the movie...
http://www.kcet.org/arts/artbound/counties/los-angeles/drummer-peter-erskine-on-whiplash-film.html
From the interview...
Question: What impression of jazz studies do you think the general public will come away with from watching the film?
Erskine: I'm disappointed that any viewer of the film will not see the joy of music-making that's almost always a part of large-ensemble rehearsals and performances. Musicians make music because they LOVE music. None of that is really apparent in the film, in my opinion.
Also, the misrepresentation of the Jo Jones throwing the cymbal at Charlie Parker's feet anecdote may well lead people to thinking that Jo Jones did indeed, as JK Simmons' character avers, try to decapitate Charlie Parker at that epochal jam session in Kansas City where a very real Charlie Parker attempted to play some of his double-time / new harmony improvisation and more or less flubbed it. Papa Jo eventually tossed a cymbal towards Charlie Parker's young feet in a "gonging" motion to get him off the bandstand. Jazz masters could be tough, but the movie gets that story all wrong.
There's more if you care to check out the link...
It just seems a shame to me, that supposed jazz lovers are content to go along with such a gross misrepresentation of the music.
As for the music, I gave it a bit of a listen on youtube. A couple of nice charts, the band is tight. But who ARE the musicians playing these charts? Anybody find that out? I haven't been able to. Maybe somebody will come forward with that. (I'm not talking about the composers.) IMO, they all did the music they supposedly love a disservice, by allowing themselves to be used to portray it in such a manner.