diff --git a/.local/bin/scripts/freq b/.local/bin/scripts/freq
new file mode 100755
index 0000000..672ea96
--- /dev/null
+++ b/.local/bin/scripts/freq
@@ -0,0 +1,6 @@
+#!/bin/sh
+# Show a frequance spectrogram using sox and timg
+out=${2:-/tmp/$1-sox.png}
+mkdir -p "$(dirname "$out")"
+sox "$1" -n spectrogram -o "$out"
+timg --title "$out"
diff --git a/README.org b/README.org
index f0d862e..8fe6d82 100644
--- a/README.org
+++ b/README.org
@@ -44,8 +44,9 @@ and configuration for ~less~ and ~fzf~.
 - experiments :: kakoune
 ** Applications
 - productivity :: activitywatch-bin
-- music :: mpd mpc ncmpc mpd-mpris vlc phonon-qt5-vlc
+- music :: mpd mpc ncmpc mpd-mpris vlc phonon-qt5-vlc sox
   : mkdir -p ~/.local/state/mpd && systemctl --user enable --now mpd mpd-mpris
+  : sudo npm install -g bpm
 - bluetooth :: bluez bluez-utils pulseaudio-bluetooth
 - tagging :: puddletag beets picard ffmpegthumbnailer
 - sync :: syncthing