Explaining the difference between the chorus effect and the flanging effect can be difficult. Both effects result from the phase-delaying of two identical signals, and varying the time of the phase delay in a regular cycle. From there, however, the conversation gets a little, umm, obtuse (and we're not even talking about the "phasing" effect, yet). The best way to experience the difference is with the T-Rex Twister pedal.

With the simple tap of a button, the T-Rex twister can produce either a chorusing effect OR a flanging effect, both from the same basic circuit. As the guys from T-Rex explain. "Well you're dirty and sweet, clad in black, don't look back, and I love you; you're dirty and sweet, oh yeah," which we take to mean that they had originally intended to build a simple chorus pedal, but Glenda and some old guy in a hot air balloon convinced them to build a flanger out of the box as well.

If the pedal's function as an elucidating comparative example wasn't enough of a selling point, the T-Rex fellows put together a list of additional features for consideration:

Why should you buy this baby?

1. It is probably one of the best chorus and flangers on the market
2. The sound is very analogue, rich and full filling
3. Goes from slow rotating sounds, to fast vibrant sparkle
4. It switches between light airy effect - to heavy drastic chorus/flanger
5. Price is fair. Good value for money.
6. Input level is adjustable, to prevent overdrive
7. It has wondeful (sic) stereo output, which makes it sound even greater
8. It's built like a tank and T-Rex grants a 2 year warranty

Controls include chorus / flanger switch, depth, regen, tone, rate, heavy / light switch and level. The unit runs off 9v battery or power supply.