The Tesira SOC-4 is a modular analog output card for use with Tesira SERVER or SERVER-IO devices. Each SOC-4 provides 4 channels of mic or line level audio output. The outputs are electrically balanced and provided on plug-in barrier strip connectors. Software control of each output includes mute, level, signal invert and full-scale output reference. The modular card shall provide 4 balanced outputs on plug-in barrier strip connections. Software configuration and control for each output shall include mute, level, signal invert and selectable output reference level. Digital-to-Analog conversion shall be 24-bit with a sampling rate of 48kHz.