A quick look at the datasheet doesn't seem to highlight an obvious way of sending audio-rate data out of the micromoth. Maybe you can check their extended documentation to see if they have any support for sending I2S or TDM digital audio out, in which case you should be able to connect it to Bela. According to this other discussion, you can send audio through the usb port, which comes with a different set of problems, namely that there is some overhead and added latency. I will try to respond there soon.
