The Jam Corner

Expression pedal assignments are commonly used by musicians using electronic means. Generally, an expression pedal for a guitar effect is similar to a continuous controller on a MIDI instrument (such as a keyboard). Potential uses for continuous midi controllers are pitch bend or modulation; guitar effects are usually more along the lines of volume or wah. The idea is that a certain parameter, such as volume level, is assigned to a number – for instance, the GNX volume pedal can have any value between 0 and 99 – and then controlled in real-time, much like you might do with a volume fader or pot.

The possibilities on the GNX units are actually quite impressive: you can assign most parameters – amp, effects, etc – to be controlled using the expression pedal. Moreover, you can create “multi-dimensional” effects by assigning multiple parameters (up to three at a time) to be controlled with the expression pedal.

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We've heard and seen it all - GNX3, GNX4, GNX3000. What is the difference? More importantly, will it make a difference to you personally?

That's a difficult question to answer, but depending on your situation and preferred usage, the answer may actually exist! GNX3 and 4, for example, provide an onboard recorder and built-in looper. Do you really need that? Well, it is pretty easy to use, and lets you record your riffs on the spot - always (so long as you have a big enough memory card). However, if you're into PC recording, you may not need that - in which case GNX3000 will probably be a better choice for you.

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This is a continuation of the overview article on expression assignment for the GNX series. GNX3000 users can attempt to replicate this functionality using the expression pedal, since no footswitch controller assignments are available. There's an article coming up on this subject in the near future.

As mentioned in the introductory article, each footswitch controller assignment allows us to toggle between two particular values of up to three parameters. Before we proceed to examples of how this can be helpful (beyond the default on/off examples we already discussed), I'd like to elaborate a bit on a few interesting features and quirks of the GNX controller assignments.

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Expression assignments is one of the features of GNX units that make it a versatile, programmable tool. This versatility comes in most useful in live situations, but can be effectively applied when recording or mixing, as well.

The three categories of expression controllers are (1) assignable footswitches, (2) assignable expression pedal, and (3) LFOs. On the GNX3000, the footswitches are not assignable, so only expression pedal and LFO assignments apply.

First, let’s talk about how to actually assign things to the expression controllers. In general, the best way to work with these is using the GenEdit or X-Edit interface – both enable you to see all the parameters, and troubleshooting particular effects and settings becomes a whole lot easier. However, the exact same programming is possible using the GNX on-board interface. Here’s how to get there:

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