Drawbar Organ Voicings
OK, this post is just for me so I can easily find this webpage again. But if you’re curious, “drawbars” are the sliders on a Hammond B3 organ (or a Korg CX3 in my case) that you pull out or push in to mix the sound. Each drawbar corresponds to a particular tone or overtone, similar to a pipe organ. Most electric organs have 9 drawbars, and by pulling them out to different lengths you can create many different sounds.
The webpage I’m linking to has a list of many popular settings, such as the one used by Booker T for playing “Green Onions.”