If you need to use menu options for directing calls, try to keep these as short as possible, for example... “Thank you for calling Media Music Now. So that we can connect you to the most appropriate department, please choose from the following options: press 1 for general enquiries, press 2 for help with downloads and 3 for any other enquiries.
For a more modern example of a bad choice of hold music, let’s take an example I have to endure on a regular basis, Month of Sundays by Passenger. At CD quality it’s got lots of interesting stuff going on, which you’d imagine might be ideal to distract someone from the fact they’re being kept on hold for ages. However, playing it over the phone it’s simply too busy. As soon as the brass and backing vocals kick in it just sounds yuck.

Send that message, or get information needed, and press thumb button at bottom center screen/phone and all apps on “Home Screen” will return, If need to return to actual call in progress/or on hold, press the center button twice quickly.
Your audio image is important. Phone contacts are often the first impression people have of your business. If they must hold on the phone, this is your chance to impress them with relevant greetings and telephone hold messages. Callers can be existing clients, future clients, potential customers, and they are all important. A professional voicemail recording boosts your credibility, and encourages prospects and potential connections to leave a voicemail when you can't answer the phon.