For those still using analogue or digital phone systems, voice on ISDN circuits has a bandwidth of around 4000Hz. The audio from an analogue phone is sampled at 8000Hz, and because of the nyquist theorem, must be low-pass filtered to 4000Hz. So any frequencies in the audio beyond 4000Hz are lost. Interestingly, the human ear and mind are good at recognising human speech, so this is considered "toll-quality" voice, i.e. good enough to pay for. This is the reason why certain vocalised letters are difficult or impossible to tell apart on the phone. For example, the differences between B, P, T, C, etc. are almost entirely above 4000Hz.
A comedic on hold message script isn’t just some novelty you can invest in because you feel like it. It’s a way to distinguish your company and establish your brand, and it can help make your customers more eager to do business with you. It’s icing on the cake of your company; without it, it’s not really a cake at all.

Hiring a specialized on hold messaging company can get expensive. As a more affordable alternative, you can use pre-made, ready to use on hold messages and music, like the examples we mentioned earlier.
Even if you’re business is not getting a high volume of inbound calls, if you transfer ANY calls or ever put customers on hold, even for just 10-15 seconds. Always use that time to give the customer another reason to think positively about your business.