restructured again

overlays/customscripts/src/batspec

@@ -1,2 +1,3 @@
-#!/usr/bin/env bash
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p ffmpeg sox
 mkdir spectrals; cd spectrals; for x in ../*$1;do sox "$x" -n spectrogram -o "$(echo $(ffprobe -loglevel error -show_entries format_tags=track -of default=noprint_wrappers=1:nokey=1 "$x") - $(ffprobe -loglevel error -show_entries format_tags=TITLE -of default=noprint_wrappers=1:nokey=1 "$x")).png"; done