animoog-import.sh

#!/bin/bash
# convert any audio file to Animoog format
# usage: script.sh <source.m4a> <sample start> <sample length>

src="$1"

samplerate=44100

start=$2

duration=$3

#targetduration=0.371519

# multiply sample rate by ratio of duration / target 
# to bring ouput length to 0.371519
outrate=`python -c "print($samplerate*$duration/0.371519)"`

if [[ -z "$4" ]]; then
outfile="${src%.*}.mono.wav"
else
outfile="$4"
fi

echo "$outrate"
echo "$outfile"
echo "------------------------"

ffmpeg -ss $start -t $duration -i "$src" \
        -filter_complex "[0:a]asetrate=$outrate,aresample=44100" \
        -ac 1 -ab 705k "$outfile"