Hold music gained mainstream popularity in the early aughts. As cell phone customization became more of a focus, ringback tones gained popularity. People carefully chose the song to play in lieu of ringtones for incoming calls. It was a chance to control the call experience and showcase your personality before you even said hello. By the time the first US national carrier offered ringback tones in 2004, it was a multibillion-dollar industry. Hold music keeps your callers distracted from the wait. Why Use Hold Music at All?
Prompt, efficient turn around time, and always delivered when they said they would. Very accommodating of the changes we wanted, and great customer service. Thanks Sian!

BDM Voice also offers a number of market-leading call recording and call tracking solutions to enable you to record both inbound and outbound calls. If you’re interested in learning more about our Insight and insight:onsite products then please view our call recording solutions.
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.