The last two decades, there is an increase in using multiple MIDI Controllers in order to give more expression to musical instruments produced by virtual synthesizers. Some of these parameters are Dynamics, Expression, Vibrato depth and rate and so on. Others are Filters, Cut off frequency, Resonance, Envelopes and Effect parameters.

A big example is Kontakt by Native Instruments^® but nowadays almost all virtual instruments provide the opportunity to deal with such expression controls.

However, in hardware market there are not many brands which produce this kind of tools. Usually we can find some of these tools integrated on expensive synthesizers and some cheaper alternatives don’t provide flexibility.