The ISA 430"s optional A/D is stereo and allows for inputs from internal (post-processing and external sources simultaneously giving a clean, protected, high-quality path to stereo digital media. * With the Stereo A/D card installed, the ISA 430 can be used as a high quality mono/stereo tracking converter, or at mix down as a stereo converter channel for routing complete mixes to digital media. * Two ISA 430s can take full advantage of the one A/D converter, with one ISA 430 acting as the master and the other as the slave. * The ISA 430"s optional A/D is stereo and allows for inputs from internal post-processing and external sources simultaneously * With the Stereo A/D card installed, the ISA 430 can be used as a high quality mono/stereo tracking converter, or at mix down as a stereo converter * Two ISA 430s can take full advantage of the one A/D converter, with one ISA 430 acting as the master and the other as the slave