The VSIO Adapter is a dS-NET peripheral primarily intended for use with the dScope Series III test and measurement system. It is an interface adapter which allows bi-directional translation between the dScope's AES3 output and input, and serial audio multiplex interfaces (for example I2S) such as are commonly found on digital audio ICs. The exact timing arrangements of the serial multiplex and its electrical properties (such as rail voltage) can be freely adjusted by the user. The VSIO Adapter can transact up to 16 multiplexed channels on a single wire, or up to eight on each of two wires, or up to four on each of four wires. Each VSIO output 'slot' (channel) can be driven from the dScope Signal Generator's A or B channel, or can be muted; any two VSIO input slots (channels) can be routed to the dScope's Signal Analyzer. Audio wordlengths between 8 and 24 bits can be positioned anywhere within a slot length of 8, 16, 24 or 32 bits; data can be transacted MSB- or LSB-first. Clock polarities and multipliers can be freely selected; frame clocks can be generated one-bit-early or single-bit-width if required; sign extension is supported. Synchronisation can be from the dScope of from the EUT (either SCK/LRCK or MCK), and EUT rail voltages of 1.8V, 2.5V, 3.3V or 5V (TTL or CMOS threshold) are supported.