Synths are great. You push a key, turn a few knobs and suddenly you're making "music." So when keyboard maker Korg realized it had a hit with its low-cost, entry-level Monotron series, it was only ...

Korg debuted its Nutube tech a couple years back, but so far the tiny vacuum tubes have only surfaced in select products. Nutubes have been used in a distortion pedal and a mini guitar amplifier head, ...