If you know what you're looking for, use the Search Page. Say your looking for Tommy Jarrell tunes, type in Tommy Jarrell. Every Tommy Jarrell track will show in the list. Furthermore If your looking for just Tommy Jarrell tunes in the key of D, over on the right side, you can narrow your search to just Tommy Jarrell tunes in the Key of D.
If you don't know what you want, use the Search Page. On the right hand side of the page are dozens of searches ready to go. Say you want to find all the fiddle tunes in DDAD tuning. Click on DDAD. Ok, you get the picture.
And don't forget the the "sort" feature in every collection. Say you are interested in the Old Time Kentucky Fiddle Tunes Collection. By default the tunes are in alphabetical order. By clicking at the top of each column, you can sort by Artist, Key and Tuning as well.