Can this do recording, too? I'm wondering how to record and process rodent vocalizations in ultrasound (around 20khz) using the cheapest way possible, akin to t

Can this do recording, too? I'm wondering how to record and process rodent vocalizations in ultrasound (around 20khz) using the cheapest way possible, akin to the "Deep Squeak" project. There are some interesting applications in lab animal welfare, psychology and even training for land mine or TBC detection. High frequency measurement microphones are very expensive. If there was a way to churn a high sampling rate ADC through an FFT inside an FPGA, that would help a lot and it may be simpler or cheaper than for more sophisticated measurements. But beyond basic things like Nyquist frequency I don't really know what I'd need in a microphone and the analog/digital backend...