Here is the full list of all 12 JAM Live Music Arcade trophies - there are 7 bronze, 4 silver and 1 gold.
Record a performance.
Trigger a track on-beat during a performance.
Play a recorded jam in Arcade Mode.
Complete 5 jams in Arcade Mode.
Trigger the same track on-beat three times in a single jam.
Trigger 20 consecutive loop tracks on-beat.
Trigger 4 consecutive bankset changes on-beat.
Trigger 20 consecutive freeform tracks on-beat.
Earn 20 bronze medals in Jam Mode.
Earn 20 silver medals in Jam Mode.
Earn 20 gold medals in Jam Mode.
Complete all jams in Arcade Mode.