Add script for concat'ting wav's

process-bpl.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+year=$1
+
+python3 speak.py $year
+python3 ffmpeg_input.py $year
+ffmpeg -f concat -safe 0 -i inputs-$year.txt -c copy output.wav
+ffmpeg -i output.wav bpl-$year.mp3
+rm output.wav