OS 2.0 is now available for the Teenage Engineering EP-133 KO II synthesizer. | Image: Teenage Engineering
Nearly a year and a half after it first launched the EP-133 KO II synthesizer in late 2023, Teenage Engineering has released its first major software update. The OS 2.0 update, which can be downloaded to the synth through a web browser or installed using a USB cable, includes features like creating new samples from existing samples or beats, hands-free sampling while playing another instrument, and the ability to layer and play more sounds simultaneously.
You can see all of the new features in the OS 2.0 release notes, but the most significant update appears to be new resampling capabilities that let you process or add effects to existing samples to create brand new ones. The update also allows you to create new samples by capturing snippets of a beat made up of previously recorded samples. The KO II is also getting a new hands-free sampling mode letting you record the sounds from an instrument that requires two hands to play – like a piano – without requiring a third hand to press record or stop on the synth.
Teenage Engineering has also increased the number of sounds that can be layered and played simultaneously on the KO II from 12 mono and six stereo to 16 mono and 12 stereo with OS 2.0 installed. Other upgrades include a new song mode that “adds the ability to chain scenes and create longer, more structured track arrangements,” and sidechaining that “allows one sound to control the volume of another.” So the volume of a bass drum in a beat can be automatically lowered whenever the sound of a kick drum plays so it’s not drowned out.
The $299 KO II falls somewhere in between the company’s $59 Pocket Operator synthesizers and its expensive but highly-capable $1,999 OP-1 Field. It’s positioned as a sort of advanced musical toy, but musicians might now find it a more capable song-making tool with OS 2.0.
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