On Fri, Apr 22, 2011 at 7:18 PM, Ivan K <ivan_521521 at yahoo.com> wrote: > I have an old Alesis QSR which has an optical digital output > that is in a "proprietary Alesis format". The manual says: Its just ADAT, from what I can find online. There is a good selection of PCI cards that support ADAT I/O.