HV-316 8-Channel Analog Output Option 
The AOO Analog Output Option card provides 8 channels of HV-3 balanced output stages, effectively identical to HV-3C, HV-3D, etc. 
The AOO takes a direct balanced signal feed from the analog gain stage of each HV-316 mic preamp -- there is no ADC or DAC in the analog output path. 
Analog outputs are terminated on a 25-pin sub-D connector using the AES59/Tascam balanced format standard. 
The AOO card is a factory-installed option.