Hello guys,
I've used the 4066B and 4051B for several applications in the past. Another issue you have to be aware of is the switching transient that gets injected into the signal (audio) when the switch is turned on or off. This may or may not be a problem depending on how often you have to switch. There are better analog switches out there too though with a price tag to match, so you should probably go over the spec's and see what looks good for your application.
BTW the 'B' package chip 4066B is a little better than the original chip that has no suffix 4066.