wav_to_flac_recursive.sh

#!/bin/bash
# This program finds (recursively) all ".wav" files in the current
# directory, converts them to ".flac" and deletes original ".wav" files.
# Requires "sox" to be installed. (sudo apt install sox)

SOURCE_EXT="wav"
TARGET_EXT="flac"

# https://unix.stackexchange.com/questions/9496/looping-through-files-with-spaces-in-the-names 
find .  -type f -name "*.$SOURCE_EXT" -print0 | while IFS= read -r -d '' file
do
    f_basename=$(basename "$file")

    # strips out extension from file name
    f_basename_no_ext="${f_basename%.*}"
    f_dir=$(dirname "$file")
    target_file="$f_dir/$f_basename_no_ext.$TARGET_EXT"
    echo "$file -> $target_file"
    sox "$file" "$target_file"
    rm "$file"
done