Difference between ESP32-A1S and other modules?

[JustNopIt]

Does the ESP32-A1S have any additional chips under the hood? It claims to have audio pins like "LINEINR", "LINEINL", "MIC1P" and "MIC1N". Are these pins just normal ADC pins?

Is there anything else special about the ESP32-A1S compared to the ESP32­-WROOM­-32 or similar modules?

[WiFive]

https://docs.ai-thinker.com/_media/esp3 ... cation.pdf