Sound Logger

#!/bin/bash
# Fixed issue with microphone stuttering ( changed to mono sound as per the man page )
# http://stackoverflow.com/questions/2613163/monitoring-an-audio-line#_=_

noise_threshold=3
storage_folder=~/Recordings
raw_folder=~/Recordings/tmp
split_folder=~/Recordings/split
sox_raw_options="-t raw -r 48k -e signed -b 16"
split_size=1048576 # 1M

mkdir -p ${raw_folder} ${split_folder}

test -a ${raw_folder}/in.raw ||  mkfifo ${raw_folder}/in.raw

# start recording and spliting in background
rec ${sox_raw_options} - >${raw_folder}/in.raw 2>/dev/null &
split -b ${split_size} - <${raw_folder}/in.raw ${split_folder}/piece &


while true; do
    # check each finished raw file
    for raw in $(find ${split_folder} -size ${split_size}c);do
    max_level="$(sox $sox_raw_options  ${raw} -n stats -s 16 2>&1|awk '/^Max\ level/ {print int($3)}')"
    if [ $max_level -gt $noise_threshold ];then
    if ! test -e ${storage_folder}/$(date +%F)
    then
        mkdir ${storage_folder}/$(date +%F);
    fi
        sox -c 2 ${sox_raw_options} ${raw} ${storage_folder}/$(date +%F)/recording-$(date +%FT%T).ogg;
    fi
    rm ${raw}
    done
    sleep 1
done