Rock Band

[dknightx]

question ... ive only played guitar hero once, and i was playing rock band over the weekend, and on some of the expert songs, on the fast parts, i was having trouble strumming and fingering the notes at the same time. Then I noticed that at some times (not in the solo sections), i only had to strum the first note in the riff, and then just finger the 2nd (and maybe 3rd?) note. But then i wasnt very confident as to when I could just strum once, or i had to strum for every note ... whats the rule/trick behind this?