“The human brain reacts differently to different types of music, eliciting very specific emotional, physical, and behavioral responses, almost as if music were a map, communicating emotions to a brain even better than words. As in conversation, different inputs stimulate nearly all of the brain.”
If it is a genre, hold music, it's fair to say, is a troubled one with few hits. It's not really meant to be loved or even listened to — it's meant to communicate something specific: Don't hang up. (Cornell makes this plea specifically at the end of his song.) Silence is believed to be a death knell for phone calls — people will simply think the line is dead and hang up. This is true even on non-hold calls; it's why phone companies transmit something called a "comfort tone" over phone lines, a barely audible synthetic noise that signals a connection is still there.

Your auto attendant says a lot about your company! We’ll help bring a friendly and approachable tone to your brand. Choose from a wide variety of voices and music to suit your company’s image. We can also provide your brand with multiple languages and accents.
Do you care about the experience customers have in your store or facility? Are you concerned about the way your representatives communicate with your client base? Do you care about the experience callers have while they're waiting to speak to those representatives?