The first double-tracked solo I did was on the demo for Keep Yourself Alive, then Procession on the second album was the first proper multi-tracked song. I was very into mediaeval and early English music at the time and recorded Procession with nine guitar parts. That's this Deacy amp. It's a little one-watt amp that John Deacon built and brought into the studio one day. I had done Procession with AC30s and it sounded just a little bit too smooth. I wanted it to sound more violin-like and orchestral. So I double tracked some of the layers using that little amp. Incredible. I've used it ever since on anything where there's a real orchestral type sound. And depending where you put the microphone in front of the amp, you can really tune the sound. It's very directional. It's a germanium transistor amp, which is transformer coupled-unlike things these days; that isn't really done anymore-with silicon transistors. There's this guy, Dave Peters, who is one of the designers of the AC30 and a real expert on valve electronics and the early days of transistors. I'm working with him trying to reproduce the Deacy amp. Maybe we'll put it on the market. I have to talk to John about it, as it happens. Because John made the thing. And he's very kindly allowed me to use it ever since. It's pretty magical.