Published on September 15, 2008 Really easy if you have the song Silver from the Pixies (downloadable content). The song contains about 25 notes only for bass and there all long notes and a few seconds apart. Also, if you this song, go for the flawless drums achievement. There is foot tapping but all the notes are yellow+green+bass tap at the same time. About 30 notes for drums on Expert so it should give you 50 G if you do both