Quartet 
To dream of a quartet playing romantic music indicates that you may deserve some special time with a loved one. Note the music, emotions, and surroundings, as there may be hints for improving your relationship.
Rapping
To hear a rapping in a dream suggests that you have fear of an approaching confrontation. You may be experiencing guilt which you're afraid may be catching up to you.
Composer
To dream that you are a composer represents your ability to use imagination, inspiration, and innovation to apply new ideas to your life. You feel revitalized and able to accomplish anything.
CD Player
To dream of a CD player symbolizes the image and personality that you want to portray. This is how you want others to perceive you. It may also reflect your enjoyment of music and harmony.
Pantomime
To dream of watching a pantomime may mean that you feel you are playacting in life and not being honest with those around you.
To dream you are the lead actor in a pantomime implies you may be overreacting to things and it is becoming irritating to yourself and others. Note the title of the pantomime and the character that you are playing for clues to resolving any uncomfortable situations in your waking life.
Amplifier
Dreaming of an amplifier indicates that you are feeling ignored or disregarded in some way. Try to speak up more and do not give up until you have gotten your point across.
Headphones
Headphones symbolize privacy since no one but you know what you're listening to at that moment.
To dream that you are wearing headphones reflects the same thing. Sometimes, it also points to being in harmony with one's intuition. It also indicates sufficiency and acceptance.
Bootlegger
Bootlegging something in a dream symbolizes your subconscious expressing that you are entitled to something or that you are above a law or rule. The environment and circumstances of the dream may be able to shed further detail on what this opinion pertains to in your waking life. For instance, bootlegging something while at work in your dream may be showing that you feel you can get away with more than others at your workplace.
Dance Class
A dance class in your dream implies the imminent release from a discouraging emotional situation. It suggests rapid growth based on prior personal development and inner fortitude, in other words, you may be about to reap the harvest of seeds sown in the past.
To dream that you are watching a dance class in progress can indicate movement into a pleasurable period of creativity.
Dreaming that you are late for a dance class belies an unconscious fear that life may be passing you by.
Instruments
Musical instruments in a dream represent harmony. Technical instruments are symbols of your work or an emotional state which you associate with those tasks.