The difference between the two could be summarized like this: Invoke is active and direct, and it can have a material effect; Evoke is passive and indirect, and it usually has an emotional or intellectual effect.
To call something lowercase is to say that it is generic and not special. It's a reasonable metaphorical usage, could be used generally (not specific to music criticism) but is not colloquial.
Nostalgia is a desire to return to an earlier time in life. An example of nostalgia is the craving to be back in college again.
INSOMIA originated around early 17th century from the Latin word 'insomnis' that means ‘sleepless’. While the 'in' is an expressing negation and lastly, the Latin word 'somnus' that means ‘sleep’.
The term WHITE NOISE was coined from an earlier derivative pertaining to illumination by electricity called white light which is basically a combination of different colors. White noise, therefore, is a combination of various frequencies that our ear can actually recognize and hear.