Yes; One Alesis ADAT format (Aux) Optical Output is located on the back panel. The AUX OPTICAL OUTPUT is assignable to the AUX bus, FX bus, MIX output or Group buses. So, it is possible to use this assignable Optical output as a digital Aux send. Companies such as Alesis and TC Electronics are already designing their effects units to include Optical In/Out as well as standard 1/4" jacks for patching audio signals.