Google Index.of mp3 search string/algorithm

" alan watts " (mp3) intitle:"index of" -intitle:"Index of /mp3" -intitle:"last modified" +"last modified" +"parent directory" +description +size -inurl:(htm|html|php) -inurl:index -inurl:free -inurl:franceradio -inurl:randombase -inurl:listen77 -inurl:vmp3 -inurl:audiozen

got it through:
http://www.gooload.com/