Tobias from Teenage Engineering confirmed today that sampling is coming to the OP-Z “soon”. In a video interview with SonicState, Tobias demos the sampling functionality where you can sample directly from the built-in microphone or via the headphone line-in.
In the video below you can also see the accompanying app update where you can transform the waveform similar to what you could do on the OP-1. It also appears to have the same specs for sample length for synths and drum samples (6 and 12 seconds respectively).
Can’t wait!