How do I find folders without MP3's

I have been cleaning up my music library and now have a need to locate all sub-folders and folders that contain files other than mp3's. Does anyone have a script that does this or is there a Regex that could be used to locate folders that contain files other than mp3's?

THX
Jeff

As usual, I am a Euro short and a day late. If you still need to find folders with no mp3 files, here is a crude piece of VBScript that will do it.
Run it from the command line or with a button:
Put it in a file with vbs extension, I use "aretheremp3s.vbs", then run it as:
cscript .vbs
I ran it as:
cscript aretheremp3s.vbs E:\test
Output will go into a file named notfound.txt
All this can be easily changed. If you run into permission problems, even running as admin, you can uncomment the line on error resume next. That will allow it to continue, skipping the folders you don't have permission to access. It should get the folder you name on the command line and all subfolders.

'uncomment to avoid permission errors
'on error resume next 
dim arg,f, fs, fc, f1, found, fsOut, notfoundtextfile, counter
'function to look for .mp3 file types
function getdirs(dirname)
'ignore recycle bin, doc and settings and Sys Vol Info
if((instr(1,dirname, "RECYCLE",1)=0)AND (instr(dirname,"Documents and Settings")=0)) then
	if(instr(dirname, "System Volume Information")=0) then
		counter=0
		found=0
		Set fs = CreateObject("Scripting.FileSystemObject")
		Set fsOut = CreateObject("Scripting.FileSystemObject")
		set notfoundtextfile=fsOut.GetFile("notfound.txt")
		set txtstr=notfoundtextfile.OpenAsTextStream(8) 'append mode
		Set f = fs.GetFolder(dirname)
		Set fc = f.Files
		if(fc.count>0) then
			For Each f1 in fc
   			if(instr(f1, ".mp3"))>0 then   'found an mp3
   				if(counter=0) then 
   					'uncomment next if you want to see found paths
	    			'wscript.echo "found: "& f.path
	    			counter=1 ' don't look for any more mp3s
	    			found=1   ' found, don't log thie folder
	    		end if
	 			end if
			next
	 	  if(found=0) then   ' no mp3
			  	'uncomment next line if you want to see them
			  	'wscript.echo  "not found: "&f.path  
			  	txtstr.WriteLine(f.path) 'write path to file		  		
		  end if 
		else 
			'uncomment if you want to see them
			'wscript.echo  "not found: "&f.path
			txtstr.WriteLine(f.path) 'write path to file		
		end if
		found=0
		txtstr.close 'close the output file
		set fd=f.subfolders 'look for subfolders
		if(fd.count>0) then
			for each fname in fd
				getdirs(fname)  'recurse if subfolders
			next
		end if
	end if 
end if
End function

set arg = Wscript.Arguments
'create a new notfound.txt file
Set fsOut = CreateObject("Scripting.FileSystemObject")
set outfile=fsOut.CreateTextFile("notfound.txt", true)
outfile.close
getdirs(arg(0))  'call function to check folders
wscript.echo "end"