Ensoniq DP/4
For about 200 to 300 you can pick up one of these units. I am amazed at the power these boxes have. The DP/4 has 4 effects processors, also called units. There are 4 physical inputs and 4 physical outputs (sorry, no digital i/o). Each unit is capable of processing a mono input signal to a mono or stereo effected output signal, which means you can feed the box with 4 !!!!! individual mono aux send signals from your mixing console and you`ll get up to four stereo effect signals back, either in two stereo pairs or even mixed to one stereo pair. There are also various other ways of using the inputs and outputs, e.g. 4 mono in to 4 mono out, 2 stereo in to 2 stereo out, 2 mono in and 1 stereo in to 4 stereo out and so on. This is a very versatile architecture.
There are 46 algorithms in all, 43 of which are 1-unit algs, meaning you can use 4 of them at a time, either completely independent or chained, even feedbacked into each other.
These algorithms include: various reverbs (including reverse and non-linear)
delay, VCF-Distortion, guitar amp, rotating speaker, panner, chorus, flanger, phazer, pitch shifter, tremolo, compressor, expander, ducker / gate and many more.
2 algs are 2-unit so you can use two of them at a time, which are 2 unit pitch shifter and 3.3 seconds delay.
The vocoder is the only 4-unit preset, taking up all of the DP/4´s processing power.
One great thing about this box: you can literally tweak the hell out of it. Each preset offers at least 10-20 parameters you can edit, and each parameter can be controlled via MIDI in realtime, simultaneously, for all 4 units!!!
The signals fed through the 4 units can be configured in numerous ways, enabling you to create complex and unique effect routings. You can, for instance, route 4 signals through 4 units independently in a parallel mode, mixing them together at the outputs, or you can feed 2 signals through 2 units each in a serial mode, or 1 signal through 2 units in a serial mode and 2 through 2 units in parallel mode and so on. Even more, you can feedback a unit`s output to its own or another unit`s inputs. There are so many possibilites.
Check it out!