If a match occurs, the play procedure is called. The default volume is 50. Note that some systems may not support or may override requests for a specific volume. If the sound name does not have a leading directory, several default directories are searched. You can use a tool such as SoundApp to do this.
Sound generation is on by default.
Messages do not have to be announced. This can be done by removing any action after matching them. Similarly, it is possible to suppress particular messages from displaying on the screen. See the configuration file for examples. This section describes the default keyboard bindings.