This means OnSIP customers can now insert custom music, advertisements, company announcements, self-recorded messages, or any other pertinent audio media, into their on-hold music. Additionally, these custom messages can be scheduled to play at specific times on specific days!
Website: https://play.google.com/store/apps/details?id=org.jefferyemanuel.phonemusic&hl=en_US&gl=US

Corporate cost-cutting and new technology have resulted in the advent of automated systems that can make the on-hold experience even more frustrating. It can feel near-impossible to get a human on the phone these days, which a national survey conducted by Consumer Reports found to be Americans' second-greatest annoyance, after hidden fees but beating out inaccurate weather reports and dog poop. Green observes that often people call as a last resort, because something on the website wasn't clear, perhaps, and they really need an answer quickly. So callers are captive listeners, a state often associated with the gridlock of waiting, whether in line at a Starbucks, in a dentist's chair, or in the proverbial elevator making its slow way up.
No matter which kind of company you call — big or small — their on-hold music usually sounds like it has been recorded in a tin can. You would think that with modern technology being able to clone sheep and fly humans around faster than the speed of sound, that a creating a business phone system with clear and crisp on-hold music would be easy. But as it turns out, it isn’t so straightforward.