Teksoft has released a freeware title called AudioRoute a tool that switches the audio for VoIP software to the earpiece speaker.
This tool that can be used to route the audio from the earpiece speaker to the back speaker and vice versa. A good addon for VoIP utilities.
Features:
- Routes the audio output to earpiece of back speaker
- VoIP compatible
- Easy to use User Interface
- Command line support
- Uses Teksoft’s DynRIL library