Yamaha CD8-AT ADAT Expansion Card for 02R 03D Digital Mixers. Yamaha CD8-AT Expansion Card Yamaha CD8-AT 8-Channel ADAT Digital Interface Card for the Yamaha 02R and 03D Digital Mixing Consoles. The CD8-AT Features 8 x ADAT Digital Inputs and Outputs on Optical Toslink Connectors. This Yamaha CD8-AT is Fully Working and in Good Condition.