Definitely time for the International Phonetic Alphabet!
Here are a couple soundboards I found. They aren't great, and one of them is definitely just for General American English, but it's a start.
	
	
	
		
			
			
				
					
						
							 easypronunciation.com
						
					
					easypronunciation.com
				
			
		
	
				
			Here are a couple soundboards I found. They aren't great, and one of them is definitely just for General American English, but it's a start.
International Phonetic Alphabet for American English — IPA Chart
Find examples of American English words for each sound of the American English language. Watch a video with a native speaker pronouncing each word.
				 
				 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		