diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..740cf02
Binary files /dev/null and b/.DS_Store differ
diff --git a/larynx.d/.DS_Store b/larynx.d/.DS_Store
new file mode 100644
index 0000000..cd3bb39
Binary files /dev/null and b/larynx.d/.DS_Store differ
diff --git a/larynx.d/batch_play_wav.sh b/larynx.d/batch_play_wav.sh
index 7f0d312..c7968b3 100644
--- a/larynx.d/batch_play_wav.sh
+++ b/larynx.d/batch_play_wav.sh
@@ -22,14 +22,17 @@ main() {
    trap cleanup EXIT
 
    for f in ./script.d/*.wav; do
+      export f=$f
       if [ "$#" != "0" ]; then
-         eval "$1"
+         echo "> $1"
+         bash -c "true; $1"
       else
          read -p "enter to play <$f>"
       fi
       mpv --no-video "$f" &
       export pid=${!}
       block_proc $pid
+      break
    done
 }
 
diff --git a/larynx.d/batch_txt_to_wav.sh b/larynx.d/batch_txt_to_wav.sh
index 97d9270..5dc886d 100644
--- a/larynx.d/batch_txt_to_wav.sh
+++ b/larynx.d/batch_txt_to_wav.sh
@@ -5,7 +5,7 @@ for f in ${@:-./script.d/*.txt}; do
    curl \
       -sS \
       -X GET \
-      "http://localhost:15002/api/tts?voice=${VOICE:-"en-us/glados-glow_tts"}&text=$(urlencode $(cat $f))" \
+      "http://localhost:15002/api/tts?voice=${VOICE:-"en-us/glados-glow_tts"}&text=$(urlencode $(cat $f))&lengthScale=${SPEED:-1.00}" \
    > ${f%.*}.wav
    echo $?
 done