Add complete audio conversion tip

plugins/README.md

@@ -66,7 +66,7 @@ Plugins are installed to `${XDG_CONFIG_HOME:-$HOME/.config}/nnn/plugins`. You ca
 
 With this, plugin `fzy-open` can be run with the keybind <kbd>:o</kbd>, `mocplay` can be run with <kbd>:p</kbd> and so on... The key vs. plugin pairs are shown in the help and config screen. Up to 10 plugins can have such keybinds.
 
-To assign keys to arbitrary cli commands (non-shell-interpreted) and invoke like plugins, add `_` (underscore) before the command. For example:
+To assign keys to arbitrary non-background cli commands (non-shell-interpreted) and invoke like plugins, add `_` (underscore) before the command. For example:
 
     export NNN_PLUG='x:_chmod +x;o:fzy-open'
 

plugins/ringtone

@@ -3,6 +3,10 @@
 # Description: Create an mp3 ringtone out of an audio file in any format
 #              Needs user to provide start and end where to cut the file
 #              Input file audio.ext results in audio_ringtone.mp3
+#
+#              Tip: To convert a complete media file, set start as 0 and
+#              the runtime of the file as end.
+#
 # Requires: date, ffmpeg
 #
 # Shell: POSIX compliant