Fastai2 audio only supports classification at the moment, and there is no speech-to-text functionality.
@scart97 and I are both working on speech-to-text in multiple languages (I’m attempting to use Common Voice for one of them), and we are in a fairly active audio telegram chat. If you, or anyone here, are interested, PM me your telegram info and I’ll get you added. I’m also happy to answer any questions here, or in the Deep Learning with Audio Thread