Thanks!  What is the name of the artist who produced the song with the lowest resolution?
SELECT T1.artist_name FROM artist AS T1 JOIN song AS T2 ON T1.artist_name   =   T2.artist_name ORDER BY T2.resolution LIMIT 1
artist who produced the song with the lowest resolution refers to MIN(song.resolution); need to join artist and song tables on artist_name to find the artist of the song with the lowest resolution;