Currently Being ModeratedMar 9, 2013 1:54 PM (in response to John Mclaughlin4)
It is more likely to be Messages Menu > Preferences > Alerts > (Message received in top item drop down) and the Speech tick box.
Also check the Text Invitation setting.
Example of the second
In Buddy Lists
These can be individually set to a Buddy at a time.
Highlight a Buddy in Buddy list.
Use the CMD and i keys (Get Info) together to see the info panel.
Change the tab to Alerts
Same setting as above.
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously