1970s Yamaha EM-130 Mixer w/ Beatbox Demo

Complete Record: This is an early Yamaha mixer with a built-in beatbox. I couldn't find any other audio demos of this thing online, so I figured I'd make one. It only has a few different preset beats, but as with most drum machines of this era, you can press multiple buttons at once and combine the beats to get more interesting patterns. The mixer also has a spring reverb, which the beatbox isn't hard-wired to, but you can get around that by patching one of the outputs to a channel input and turning up the reverb. I demonstrate this in the second part of the video. At the end I add in a little bit of the tuning knob.