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Listen to your tinySAAfter a small HW modification it is possible to listen to AM/FM demodulated signals, both in low and high input mode. The audio output circuit provides DC isolation and some protection of the DAC output  It is possible to directly connect a headphone to the audio output. If needed for volume, remove the 10k to ground and replace the remaining 10k with 4.7k The red pad connection goes to the pad with the red circle on the tinySA PCB  The ground of the audio output circuit can be connected to the pad with the green circle or to any other GND PCB edge pin. Output level is max 1.5Vpp |