The DL4 uses a combination of "live" controls and stored settings, so it can be a little confusing a first. When you press one of the preset buttons, you are recalling the stored sound saved in that location, regardless of where the model select knob is positioned. When you rotate the model select knob, you switch to that model, and the associated control positions for it are recalled. The rest of the controls become active as you adjust them. Once you have a sound you like, be sure to save it to one of the channels, because once you switch to another channel, it's gone.