How to use audio detection example: (1) Do instructions in ALSA Plugins Audio Library User Guide (2) Run ./tinyaenc_mmap -d "plug:vatics" -r 16000 -C 0 -b 32000 -t 0 -S 0 -i 0 & (3) Run ./audio_detect -D (4) Playback test audio file to Line input and alarm occur to console