Here is the full list of all 49 Band Hero trophies - there are 38 bronze, 8 silver, 2 gold and 1 platinum.
Earn all of the Bronze, Silver and Gold Trophies in Band Hero
Complete 25 online Pro Face-Off matches, win or lose
Play an online Do or Die game
Complete a song with 4 players without any members failing on expert in Career or Quickplay
Earn an 11x multiplier
Create a GH™Studio song
Complete a song as 4 of the same instrument on any difficulty in Quickplay or Career
Complete all of the tutorials
Collect all of the Secret Notes
Hint: *e***w***d
Hint: **ll*** ****l*
Hint: *** *ol**** ****e*
Hint: *a* B****a*
Hint: ***v** **y*
Hint: *e*** *c******y
Hint: *o ***b*
100% a song as a vocalist
Hint: **r* **u****
Play through every Band Hero song once
Earn 555 Stars in Career
Complete 50 of the Career Challenges at Platinum or Diamond
Hint: **n** ***k***
Hint: **l* *ll**
Complete Career on any difficulty with any instrument
Unlock every venue
Complete 75% of the gigs in Career
Complete the gigs and unlock all of the celebrity characters
Hint: ***o*n 5
Earn 333 Stars in Career
Complete 50% of the gigs in Career
Hint: A** * A*
Host an online Career game and play a song
Hint: *h* *ll-**e***** **j****
Complete 25% of the gigs in Career
Hint: **i** *i***
Hint: **l*** **ff
Complete at least one challenge for every instrument at Gold level or better
Hint: *v***s***c*
Earn 111 Stars in Career
Hint: H*****
Score over 1,000,000 points as a band in any single song in Career or Quickplay
Hint: **y O******
Successfully complete a Band Moment
Earn Diamond level on a Career Challenge
Earn Platinum level on a Career Challenge
Hint: **v** *o***
Streak through an entire song without missing a note on medium or harder difficulty
Complete a Career gig on any difficulty
Score over 10,000 points while in a single Star Power deployment in Career or Quickplay