Arduino UNO audio input from 3.5mm jack

[6v6gt]

Maybe look at something like this: Microphone Sensor AVR PIC High Sensitivity Sound Detection Module For Arduino | eBay.

To connect to a standard Uno, use duPont male to Female connectors:

40PCS Dupont wire jumpercables 20cm 2.54MM male to female 1P-1P For Arduino ...