Recently I embarked on an experimentation with old audio test equipment, Specifcally, these devices used in labs and by engineers to diagnose problems with amplifiers, radios, and telephone lines. Err, I think. To be honest, I’m not entirely sure what they were designed for, as I was no good at physics.

Either way, they look cool, and I’ve been interested in exploring some of the possibilities for a while, but didn’t know where to begin. However, I came across this guy called Hainbach on YouTube, who has put together an awesome guide that helped give me the push to dive in. I picked up a few different pieces for cheap on eBay, and began playing about with them to see what I could do. I mostly got a hold of audio signal generators, which are essentially what gives synthesizers their voice. The extent to which you can control them differs from instruments, but I was able to get some amazing sounds out of them.

I put together the track below with a single one of these devices, controlled by my Eurorack to some extent. Unlike a lot of my other music, there’s very few effects on here, and very few layers; the sounds of the test equipment stand on their own. Pretty much everything you hear (minus drums) is from the Feedback Function Generator. I love that I can get a really incredible ratchety bass sound out of this, jumping down from nice and melodic to aggressive. Perhaps I’m imagining it, but I haven’t been able to get that kind of usable range from any of my other equipment. Either way, there’s something deeply satisfying about making music with aging bits of technology that were never intended to be used this way – it sparks the creative process in a different way.

At some point I’ll go through and write a bit more about this stuff in detail, but for now, I put together this video with my initial faffing about: