[teraku]

Reminds me of the documentary of how the wah-wah pedal was invented. Apparently Warwick Electronics told one engineer to swap out an On/Off switch with a turn knob because these cost 0.25$ per piece instead of 1$. Which was huge savings in the 60s.

While experimenting, the engineer, who was also a guitarist, found that it sounds really cool to play while you turn the knob.

The director wanted to sell these knobs to jazz orchestras and big bands for the trumpeters, but the engineer was like "Hold on a second, I think we can put this in a pedal and make it a guitar thing".