Messages not playing "Sound" upon arrival of next message!

Question

At least a couple of OS X iterations ago Messages ceased to notify me that the was a message awaiting my attention.. Now, I sometimes get busy working on my MAC and forget about messages, then it dawns on me that I better check messages.. 6 hours have passed since last checking, I open it up and find there are a half dozen messages that require my instant response, but here is what I don't understand..
Too my way of thinking, a couple of years ago Messages self contained features for letting us know a new message has arrived  workout exquisitely, a little number surrounded by red appeared adding +1 to the total for each new message, but the CRITICAL factor for me was the little user customizable arrival sound that TOLD ME, "hey, Mr Busy you have another Message awaiting your perusal..."
Now, this "oh, it has to be the Front App" etc., etc.,etc., means nothing to me when I am busy, because when I am busy and screens are opening and closing to the point of looking like a flash, I can't be bothered with, Oh, right need to be sure an keep MESSAGES as the "Front" App to receive proper service from my petulant little text program... Why the **** do they mess up things that they weren't having any ******* problems with, in the first place? Now, it's a problem for me 15 hours EACH AND EVERY DAY! Hey, APPLE pull your decision-maker head's out of your keisters!
Return Messages alert regimen to the state it occupied prior to YOSEMITE & LION, I am guessing that Mountain Lion was the last iteration where we could rely of the program to tell us we had a MESSAGE waiting for us.. Why would you change that in the first place? Why change something we had ZERO problem with? Because YOU have this new bright idea called Notification Center? Well, that doesn't work for messages, because with MESSAGES there used to be a number reminding the User that he or she has 6 messages awaiting his or her attention.. YOU PEOPLE DON'T ALWAYS HAVE THE BEST IDEA'S AT APPLE, BUT  SOMETIMES YOU HAVE A GOOD A VERY GOOD IDEA THAT WE END USER'S GET COMFORTABLE WITH AND USED TO, BUT YOU THINK IT IS PERFECTLY FINE TO DISRUPT THE RELATIONSHIP A
At least a couple of OS X iterations ago Messages ceased to notify me that the was a message awaiting my attention.. Now, I sometimes get busy working on my MAC and forget about messages, then it dawns on me that I better check messages.. 6 hours have passed since last checking, I open it up and find there are a half dozen messages that require my instant response, but here is what I don't understand..
Too my way of thinking, a couple of years ago Messages self contained features for letting us know a new message has arrived  workout exquisitely, a little number surrounded by red appeared adding +1 to the total for each new message, but the CRITICAL factor for me was the little user customizable arrival sound that TOLD ME, "hey, Mr Busy you have another Message awaiting your perusal..."
Now, this "oh, it has to be the Front App" etc., etc.,etc., means nothing to me when I am busy, because when I am busy and screens are opening and closing to the point of looking like a flash, I can't be bothered with, Oh, right need to be sure an keep MESSAGES as the "Front" App to receive proper service from my petulant little text program... Why the **** do they mess up things that they weren't having any ******* problems with, in the first place? Now, it's a problem for me 15 hours EACH AND EVERY DAY! Hey, APPLE pull your decision-maker head's out of your keisters!
Return Messages alert regimen to the state it occupied prior to YOSEMITE & LION, I am guessing that Mountain Lion was the last iteration where we could rely of the program to tell us we had a MESSAGE waiting for us.. Why would you change that in the first place? Why change something we had ZERO problem with? Because YOU have this new bright idea called Notification Center? Well, that doesn't work for messages, because with MESSAGES there used to be a number reminding the User that he or she has 6 messages awaiting his or her attention.. YOU PEOPLE DON'T ALWAYS HAVE THE BEST IDEA'S AT APPLE, BUT  SOMETIMES YOU HAVE A GOOD A VERY GOOD IDEA THAT WE END USER'S GET COMFORTABLE WITH AND USED TO, BUT YOU THINK IT IS PERFECTLY FINE TO DISRUPT THE RELATIONSHIP A USER HAS ESTABLISHED WITH A LITTLE, YET SEEMINGLY INSIGNIFICANT TO YOURSELVES, BUT EXTREMELY IMPORTANT FEATURE TO US! Why is that because you can? In Law we call this hubris, perhaps you should look that up!
USER HAS ESTABLISHED WITH A LITTLE, YET SEEMINGLY INSIGNIFICANT TO YOURSELVES, BUT EXTREMELY IMPORTANT FEATURE TO US! Why is that because you can? In Law we call this hubris, perhaps you should look that up!

Answer 1

I think I have a solution.
Go to notifications Pref Pane and
make sure Messages has "Play sound
for notifications" is checked:
https://dl.dropboxusercontent.com/u/1869826/FileChute/cdfdf.mp4
<img src="https://dl.dropboxusercontent.com/u/1869826/FileChute/Untitled.jpg"/>
Thanks  ...  Ken