In the words of Strymon:

The magical combination of tremolo and reverb is the earliest example of a perfect guitar effects marriage. First pioneered within historic amplifiers of the 1960s, this harmonious coexistence has made its way onto countless records and performances from early surf, swampy bayou blues, spaghetti westerns and film noir soundtracks, to modern day indie rock. As music moves forward, guitarists continue rediscovering the inspiration provided by this perfect pair.