I noticed a similar problem upon installing Lion when it first came out. it was a big problem for me every time I switched from headphones back to regular speakers. Apple came out with an update that addressed the issue, and, with the exception of a couple of times since, I have never had an issue with this again. It has happened not at all yet under Mountain Lion.
Cheers, Harry On Jul 25, 2012, at 6:44 PM, Craig J Dunlop <craigjdun...@gmail.com> wrote: > I just installed mountain lion on my MBP. Everything was going well until I > tried to switch the soundcard to a USB headset. All of a sudden I lost all > voice over and system sounds. I did a hard shutdown booted back up computer > talks at walk on screen but no voice over app for that any ideas? > > > Sent from my iPhone > > -- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To post to this group, send email to macvisionaries@googlegroups.com. > To unsubscribe from this group, send email to > macvisionaries+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/macvisionaries?hl=en. > -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To post to this group, send email to macvisionaries@googlegroups.com. To unsubscribe from this group, send email to macvisionaries+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/macvisionaries?hl=en.