I thought it'd be interesting for non Portuguese speakers to understand what's been discussed in one of our topics.
The subject is a number of techniques that Brazilian guitarists use that diverge from the standard classical guitar.
Those techniques help create a signature sound for the Brazilian guitar, so it's interesting to understand how they work.
Some of those techniques were born in Brazil, while others were borrowed and/or changed from other musical styles, such as Flamenco.
Despite the name "rasgueado", it's not the same as it is used by Spanish guitarists. The Brazilian rasgueado typically uses i-m to strum the strings upwards, and more than one string at a time. It resembles the i-m-a motion when producing chords, but it allows for much higher speeds and it sounds different.
Baden Powell was a master of that technique. Notice that in his rendition of the One Note Samba, he uses the technique extensively after 0:45
And here's a quick tutorial as to how the technique works: