A study by Infomax inc found that callers tend to stay online for 25% longer if there is a mix of on hold messaging and not just plain music. So you need to mix it up.
Did you know that well-designed on-hold messages with pleasant, enjoyable, smiling narration, have the power to make your callers feel more confident about retaining your services? It also increases their trust in your company. It's tricky, but the reverse is really true. An unpleasant delay provides your callers with a great opportunity to judge your facilities and customer service.

You’ll notice that there’s not too much of a difference between the track when played at CD quality and over the phone. All the instruments can still be heard clearly, and the same techniques I used to introduce clipping on the other two tracks had no effect (I could have kept amplifying the track until it did, but it proved the point). And because it’s fairly bland and inoffensive, you’re not going to upset anyone too much if it’s not their cup of tea.
“These big companies [and governments] are getting away with a lot,” Browder tells me. He hit a breaking point when frustrated with the process of appealing parking tickets. He built DoNotPay to cut through hassles designed to separate us from our money. In April it raised a $3.5 million seed round led by Felicis to develop an Android version after picking up early funding from Andreessen Horowitz. Surprisingly, the startup has never been sued.