volume keys handlers

README.md

@@ -297,6 +297,12 @@ riverctl spawn "/usr/libexec/pipewire-launcher"
 ```
 
 Control microphone and volume with `alsamixer`.
+And change the handlers for XF86Audio (adding `-repeat` and replacing the spawned command):
+```
+riverctl map -repeat $mode None XF86AudioRaiseVolume spawn 'amixer set "Master" 5%+'
+riverctl map -repeat $mode None XF86AudioLowerVolume spawn 'amixer set "Master" 5%-'
+riverctl map $mode None XF86AudioMute spawn 'amixer set "Master" toggle'
+```
 
 Note that the internal microphone does not work and is not detected by pipewire.
 Only external microphones work.