It depends on your business industry, type of callers and marketing plan. Assuming that you take a profit driven approach to using your telephone on hold messages as a marketing tool, you will want to consider changing at a minimum of twice per year, however its best to be more proactive and update more often like quarterly or even monthly. Callers love something new and refreshing (don’t we all!), particularly those that frequently call back and are placed on hold! Why not inform them them of special promotions, new products, or customer service info – there’s always something more that can be said! Make the most of your telephone’s on hold messaging infrastructure. It is an effective way to win, retain, and sell your callers on hold.
Our business phone app adds a stand-alone business phone number to your personal cell phone, preserving the privacy of your personal number. One cell phone – two phone numbers – a personal number and a business number. It’s easy, convenient, and adds tremendous value to the daily lives of small business owners and entrepreneurs.

Cornell's "I'm On Hold" follows some of the industry standards, particularly around frequencies and compression, which is one of the reasons he wrote it with a country-ish melody, wanting something simple but catchy, with only a single instrument and vocals. But in other ways, "I'm On Hold" totally upends the genre by breaking the cardinal rule — that hold music shouldn't call attention to itself.
Work with professional narrators that reflect your company's image. There is basically no time to save money, and use someone with a great voice. Narrating, is a profession and goes far beyond the sound of the voice.