I don't think the station tones have changed in quite some time (almost forever!) so if they are bad, they would have had to have been bad for a really long time...
Other than "specialty tones", the only real change made that I am aware of was to shorten them to dispatch calls faster (and that was MANY years ago).
The second alarm tone is actually an EMS notification tone of some sort, whenever a hospital goes on reroute or the County goes on Blue alert, that tone alerts.
Thanks
Nate
I believe a lot of them are bad