# Studio FX

One of the most rewarding and fun aspects of Sonic Pi is the ability to easily add studio effects to your sounds. For example, you may wish to add some reverb to parts of your piece, or some echo or perhaps even distort or wobble your basslines.

Sonic Pi provides a very simple yet powerful way of adding FX. It even allows you to chain them (so you can pass your sounds through distortion, then echo and then reverb) and also control each individual FX unit with opts (in a similar way to giving params to synths and samples). You can even modify the opts of the FX whilst it’s still running. So, for example, you could increase the reverb on your bass throughout the track…

## Guitar Pedals

If all of this sounds a bit complicated, don’t worry. Once you play around with it a little, it will all become quite clear. Before you do though, a simple analogy is that of guitar FX pedals. There are many kinds of FX pedals you can buy. Some add reverb, others distort etc. A guitarist will plug his or her guitar into one FX pedal - i.e. distortion -, then take another cable and connect (chain) a reverb pedal. The output of the reverb pedal can then be plugged into the amplifier:

    Guitar -> Distortion -> Reverb -> Amplifier

This is called FX chaining. Sonic Pi supports exactly this. Additionally, each pedal often has dials and sliders to allow you to control how much distortion, reverb, echo etc. to apply. Sonic Pi also supports this kind of control. Finally, you can imagine a guitarist playing whilst someone plays with the FX controls whilst they’re playing. Sonic Pi also supports this - but instead of needing someone else to control things for you, that’s where the computer steps in.

Let’s explore FX!