Scanner Vibrato is a virtual effect plug-in that aims to recreate the scanner-vibrato effect from a well-known tonewheel organ.
The original scanner-vibrato was developed in the 1940s, and was an analog, electromechanical device, consisting of an analog delay line and a mechanical rotor ("scanner"). The rotor was driven by the organ's internal motor, and therefore its rate was fixed at about 6.9 Hz. The original scanner-vibrato could produce both chorus and vibrato effects, and it offered three depth presets.
Martinic Scanner Vibrato is modelled closely on the original scanner-vibrato, so it offers the same features (and flaws), perfectly preserving the character of the original effect. However, Scanner Vibrato is more flexible; you can adjust the rate, depth, and even stereo width. And best of all, you can apply Scanner Vibrato not only to organ sounds, but also to guitar, synthesizer, or whatever sound you like.