Imagine VTM-A3-OPT 2-F Advanced Audio Analysis Option for VTM Series Field Upgrade for VTM4150PKG-EJ3. Advanced audio analysis option; bar graphs and CineSound; view up to 8 audio channels; includes 4 analog stereo inputs, 4 AES/EBU shared input/output pairs and 16 channels of embedded audio; analog monitoring outputs of up to 8 channels simultaneously