For technical reasons, Windows MME driver support has been dropped in WaveLab 10.

Please use the Steinberg Generic Lower Latency ASIO Driver, if your audio interface does not have an own dedicated ASIO driver.

If you need to record using the Windows MME driver, you can use an older WaveLab version, for example WaveLab 9.5, with your WaveLab 10 license.

Alternatively, you could use a tool like Voicemeeter to allow WaveLab 10 to record audio sources not available via ASIO - for example, the audio output of other Windows programs that are using the built-in soundcard.