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.
The best hold music has few instruments and preferably only one. Simple music handles the change in quality better than a full orchestra arrangement. The latter gets distorted, particularly if it’s too loud for the phone to handle and clipping happens. No one wants to hear a dirge-like cacophony masquerading as “Pachelbel’s Canon in D.”

On average, 5 to 15 seconds of music plays between each message blurb. Keep your audience in mind: musical breaks that are too long are boring, but message blurbs that are long or too detailed can be overwhelming. In most cases, 5 to 15 seconds, between message blurbs that don’t exceed 30 seconds are usually appropriate.
To keep the information in your program current, you should review your script whenever your business has updated policies or procedures, new promotions or special offers, or changing customer service strategies.