Hold music is usually not a very important topic, but it speaks to the quality of the company when you are waiting to talk with someone. The hold music with RingCentral is abismal at 8khz. Most music is played back at 128khz and above. I'm not asking for you to drastically overhaul your call and hold music quality, but a low standard of 96khz would be acceptable. That is radio quality, and these days it's not asking much regarding bandwidth.