You can change the Chime/Name Announce for your account by logging in and selecting the Menu tab at the top right hand side of the screen, then click the Settings tab, then choosing 'Chimes & Name Announce' in the left-side menu.
You have the option of announcing names to the Moderator only or to all on the call. Click on the relevant slider to turn the chimes or name announce feature on (green) or off (grey) and click Save when you're done to lock in your selection. The following link will also take you directly to this setting within your account if you are already logged in: https://hello.freeconference.com/conf/settings/general/chimes
You can also choose to turn off the Waiting Room Music from here by selecting the Waiting Room tab in the menu at the left. If you turn this off, in place of music when you have the 'Waiting Room' turned on and the moderator has not yet joined, or if you are the first caller, you will hear silence.
Note: Any changes made here will NOT impact calls already scheduled. If you want to change these settings for conferences that you have already booked, you can either cancel and re-book the calls, or you can also turn off chimes during a call by pressing *8. it is not currently possible to turn off the name announcements or hold music using the telephone conference controls.