What is actually the difference between CONCEPT RECORDS and ROCK OPERAS?? I think they're the same...
Well, a concept album isn't necessarily a rock opera. Concept albums are albums where each song or track or whatever is united by a common theme, sometimes merely by interpretation of the audience. Sometimes, there's a narrative; sometimes, not. Sometimes the narrative, if it's there, is obvious; other times, the idea behind the work is kind of vague, resulting in what's often termed a 'loose' concept album ... but, yeah, the overall definition is quite broad. Rock operas are a type of concept album. Obviously, they tend to be rock albums, and they're called 'rock operas' 'cause they try to be dramatic and big in scope, musically and lyrically, much like a musical. Conceptually, they tend to follow a single plotline with outlined characters, including a central protagonist who is on some journey or another. Wikipedia can explain it like this: "... a concept album is an album that is "unified by a theme, which can be instrumental, compositional, narrative, or lyrical". Commonly, concept albums tend to incorporate preconceived musical or lyrical ideas rather than being improvised or composed in the studio, with all songs contributing to a single overall theme or unified story. This is in contrast to the practice of an artist or group releasing an album consisting of a number of unconnected (lyrically or otherwise) songs performed by the artist." "A rock opera is a work of rock music that presents a storyline told over multiple parts, songs or sections in the manner of opera. [...] A rock opera tells a coherent story, and may involve songs performed as if sung by separate characters in a drama, as in classical opera."