As with all the previous iterations, both KO! and Speak are rough-and-ready, battery-powered hardware units with a footprint not much bigger than a credit card. Both pack a built-in speaker, along with a mini-jack input – used for pulse sync and audio – and a mini-jack output. The POs are fairly robust, despite their vulnerable-looking exposed innards, but each can be spruced up and protected with the addition of the silicone ‘pro’ case, available from TE for an additional £25. Both have screens, albeit offering a fairly limited amount of parameter feedback. They’re mostly dedicated to cartoon-like graphics (plus an alarm clock). Both POs have 16-step sequencers, which can chain patterns (up to 128 for the KO!, and 64 for Speak). Both lack sound mute/solo though, which is a pain if you want to record sequences into a DAW.