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* MXR EVH-117
* Electro-Harmonix PolyChorus
==== Barber-Pole Flange ====
Some flangers provide ascending or descending "one-way" flange (like the motion of a spinning barber-pole) options via a switch. This is accomplished by using separate delay lines with different phases of the LFO. The flanger only mixes the delay line whose LFO is currently reducing (or increasing in the other mode) the delay amount with the dry signal. As the LFO's rerverse direction, the delay lines' mix proportions are slowly swapped, creating a seamless transition, while the swoosh sound always moves in one direction.
=== Chorus ===
Auto-Wah is used mostly like traditional wah - at the very front of the signal chain after the guitar. Post configuration will sound out of control, as the wah heavily filters the entire frequency spectrum other than the resonant frequency, and the resonant frequency is in constant motion. It is recommended to always use auto-wah in pre config.
== Which to Buy? ==
Older analog flangers and chorus that relied on using delay likely used "bucket brigade" technology, whose delays tended to sound a bit muffled compared to the original signal, while devices relying on digital delay are more hi-fi and transparent. Some claim that this is part of the charm of such vintage devices, making the tone warmer. Yet, many modern devices also simulate the bucket brigade impact on tone using a switch, while the quality of the simulation is debatable per device.
As far as phaser vs. flanger vs. chorus, rather than simply investigate brands and models, more importantly you should know which type of effect you want. There is more variation in tone between the different types of effects than the different models.
Some effects provide not only these basic effects but complex interactions between multiples of them. Its best to become knowledgeable about how a few different models of each basic effect sound. Then proceed to investigate the more complex options.
[[Category: Guitar]]