You can trigger the shutter with with a spoken word by using the Sound Trigger. It uses Windows Speech Recognition.
(shows ControlMyNikon, but functionality is the same in ControlMyCanon).
Initial one-time setup
– Shut down ControlMyCanon.
– Plug your microphone into your computer.
– Configure the microphone in the Windows control panel Sound applet.
– Configure and train the speech recognition using the control panel Speech Recognition applet.
– Once you have confirmed it is working, shut down the control panel applet.
Setting the Trigger
– Go to the Triggers menu and select ‘Speech’.
– In the Speech tab, put a checkmark beside ‘Enabled’. It will use the default microphone (as defined in the Control Panel, Sound applet).
– Select a microphone from the list.
– Select a language from the list.
– Set the detection threshold. Higher values ensure higher accuracy. Too high of value will cause detection to fail altogether. 92 is a good value for native English speakers.
– Set a prefix to help reduce false positives. You could set the prefix of ‘computer’ so that you need to say ‘computer’ before your chosen phrase.
– Speak one of the words or phrases listed and confirm that the action was performed.
– Some microphones are more sensitive than others.
– Take the time to properly train the speech recognition to recognize your particular voice and speech patterns. This makes a huge difference in the recognition accuracy.
– Use word or phrases with a distinct sound to make the recognition as accurate as possible.
– You can create customize the word or phrase for each action. Just double-click the command and enter the word you would like to speak to activate the action.