Speaker Control - Motorola VC70N0 Product Reference Manual

11 - 8 VC70 Vehicle Computer Product Reference Guide
Figure 3: Read-write access to Terminal Lock applet
Figure 11-5

Speaker control

Speaker control is determined by the values located at:
[HKEY_CURRENT_USER\ControlPanel\SystemManagement\SpeakerControl] registry key
Figure 4: Speaker control default state
Figure 11-6
To select Internal or external speaker modify the following value:
[HKEY_CURRENT_USER\ControlPanel\SystemManagement\SpeakerControl]
"SelectedSpeaker"=dword:00000004
For example, set "SelectedSpeaker"=dword:00000001 for internal speaker