I saw a question about Ultra96 audio, but I think it's been deleted now. For future reference, I'm not aware of any audio projects currently with Ultra96-V2. I think you will need some external circuitry to make this happen. If someone is interested in experimenting with this, I suggest looking at the 96Boards Click Mezzanine and the Audio/Voice Clicks that are available from MikroE/Avnet/Newark.
https://www.mikroe.com/click/audio-and-voice
Bryan