Factory is an aptly-named new iPad synthesizer from SugarBytes. In fact, calling it a synth is underselling it — kind of like calling GarageBand a “tape recorder”. Factory does synthesize sounds, but it also has built-in effects, a sequencer, an arpeggiator, and a totally wild DJ-style crossfader, which lets you morph between presets.

The app is ultra-flexible, as capable of finely-crafted sound design as it is of sonic mayhem.

The Synclavier is a digital synthesizer from the early 1980s. Synclavier Go! is an iPad app that mimics the classic synth. But this post isn’t about those. It’s about the Synclavier Knob, an accessory for the app.

The Synclavier Knob is a single knob on a mounting plate the size of an iPad mini. That’s it. Oh, and it costs $399.