Plug it into some speakers, you’ll find a surprisingly capable drum machine, based on a deep synth engine. While the sounds are not fully programmable from the unit alone, you can get a lot of variation from the sound morphing, automation and effects. The effects in particular make a the PO-32 useful, letting you drop in momentary fills, variations and little flourishes of sonic interest on the fly. If you want to go deeper, you can add the Microtonic software ($99) and gain complete control over the PO-32’s sound engine. And it’s genuinely pocket sized if you like to keep something more tactile than a phone with you for some beat doodling