Edit: Sorry guys I got messed up. Haven't gotten to use it yet, I'm waiting for my powerbook to arrive. From the Digi002 Rack manual: Digi 002 Rack supports consumer mode S/PDIF output format (IEC-958 Type 2) at sample rates of 44.1 kHz and 48 kHz, and professional mode S/PDIF output format (IEC-958 Type 1) at sample rates of 88.2 kHz and 96 kHz. Also: The Optical I/O ports support sample rates of 44.1 and 48 kHz in ADAT Optical mode, and sample rates up to 96 kHz in Optical S/PDIF mode. The Optical I/O ports support 24-bit, 20-bit and 16-bit resolutions in both modes.