Accordion 
A dream involving hearing accordion music foretells the coming of some pleasant event or activity that will help the dreamer feel better about something bad that has happened. If you dream that you are playing an accordion, it signifies that some strong feelings are resulting in physical and mental weariness.
Saxophone
To dream of a saxophone represents that you are harboring unresolved feelings that you need to convey. Perhaps someone has greatly influenced you or changed your life in some way.
Harmonica
Music has always been a universal language, allowing one to express all kinds of human feelings like joy, pain, and fear. To dream about musical instruments like the harmonica often refer to expressing one's emotions through those magical tunes. Since most harmonica tunes are happy and alive, dreams about them are also happy and alive You may need to have more of these types of feelings.
They also refer to living in harmony with the world.
Sandstorm
A sandstorm in a dream symbolizes overwhelming confusion. You may feel lost in a sea of responsibilities and needs.
Bay Window
A bay window appearing in your dream conveys your doubt about a situation or the outside world. A bay window arches out, allowing you to see wide view of the sky. This is the reason why your subconscious mind is bringing you that you have a perception of not trusting people nor the society easily in general. Whatever the reasons, whether valid or suspicious, a dream of a bay window refers to distrust and unwillingness to change for one's own convenience.
Weather Vane
To dream of a weather vane is a symbol of the unpredictable nature of life. Some event in your waking life may be making you feel like you are getting nowhere; you are simply treading water. If you are a particularly vain person, you can take the weather vane as a play on words. Consider working on your vanity.
Marching Band
A marching band in a dream represents your connection to others. To make a marching band harmonize takes teamwork as well as a second sense for understanding others.
To march along with the band in your dream indicates that you feel conforming to others is important in your life. You may feel great joy in your camaraderie with the group. If you feel that the band is marching you along, you may be struggling with your wish to escape conformity in your life.
Air Conditioner
To dream that the air conditioner is not working indicates that you are anxious and tense. A certain aspect or circumstance in your life has you feeling nervous and apprehensive.
To see or feel the air conditioner in your dream symbolizes release of pressure and stress. You are no longer concerned or upset about a problem or disagreement
Rearview Mirror
To dream of looking in a rearview mirror represents a focus on the past and past regret.
Alternatively, looking in the rearview mirror in a dream may indicate that you are suspicious of those around you.