Teenage Engineering adds lo-fi mode, USB audio, and more to its KO II sampler

Teenage Engineering has released OS 2.5 for the EP-133 KO II, adding major features such as USB audio, sample reverse, selectable lower sample rates, an arpeggiator, and improved autochopping. The update also doubles maximum sample length to 40 seconds by recording mono instead of stereo audio.

The update strengthens the KO II’s appeal as an affordable, feature-rich sampler that keeps improving after launch. By adding both practical workflow tools and intentionally lo-fi creative options, Teenage Engineering is leaning into the growing demand for portable hardware that feels playful but remains musically capable.