1400 Series Audio-Nav Keypad
Technical Manual
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1400 Series Audio-Nav Technical Manual Rev 2.1
www.storm-interface.com
Page 3 of 14
Typical method for audio module volume control using the API
User Action
‐
Plug in the headphone jack
Host
‐
Host system detects the connection
‐
Sets volume level to initial default
‐
Repeating message :
“Press the volume key at any time to increase
the volume level”
User Action
‐
Presses the volume key
Host
‐
Message stops if volume key is not pressed
inside 2 seconds.
Host
‐
Host system changes the volume on each key
press (up to a max limit, then revert to default)
User Action
‐
Remove the headphone jack
Host
‐
Volume reset to default.
