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- Jitter buffer length control (helps to improve call quality in case of unstable internet connections).
- Microphone level control bar. Next to it – Microphone testing button.
- Playback device level control bar. Next to it – Playback sound testing button.
- Ringtone level control bar. Next to it – ringtone sound testing button.
- Turn Echo Cancellation on/off.
- Record Device selection.
- Automatic control of the microphone level.
- Playback Device selection.
- Automatic control of the playback level.
- Ringtone playback device selection.
