Midway Fair | 1 decade ago
The warbler is my my build of Runoff Groove's Tri-Vibe. It uses a dual current-controlled operational transconductance amplifier (OTA) chip (e.g. LM13700) to create three effects: True vibrato (pitch modulation with 100% wet signal); 'Swirl' reminiscent of a mild phaser; and 'whirl' which mixes a fraction of the dry signal that is phasing, pitch & amplitude modulation, and dry signal all at once and is reminiscent of a dopler/rotating speaker effect. The Whirl setting is my favorite; it doesn't really sound like anything else and has some of the properties of a harmonic tremolo.
My camera ran out of juice near the end of the whirl setting demo, where I used some settings with the depth and speed further up, but I think this still gives a pretty good idea of what it sounds like.
My website, jonpattonmusic.com, has pictures of some other things I've built, or check out my other videos for demos of many DIY designs.
