Both chorus and flanging overlap in being short delay-based effects. Chorus effects add several replications of the original input sound, while flangers usually create one slightly slower, mildly pitch-bent effect in parallel to the original input. Analog and digital technology pushed the flanging effect, which is often used as a more extreme effect than chorus, and often compared to the sound of a jet taking off. For an expert explanation, read Andy’s Tone Tips on the two effects.