The Apogee MiniDAC is a pro-audio two channel digital analog converter. It received very good reviews when it was first introduced. The price dropped after a few years, making it good value for money. I managed to get hold of one and of the firewire interface board a little later. The firewire board is a BridgeCo design, running an ARM processor. The firewire interface deploys a smart architecture where multiple firewire units can be used together with one unit delivering the master clock to all other units. Due to the firewire architecture the computer’s driver can also be the master. The Apogee driver on OSX
With perfectionist audio, a perfect digital chain is often described as “bit-perfect”. When two player applications are both bit-perfect; there should be no audible difference between them (when the rest of the chain remains unchanged of course). People now realize this is wrong; they hear differences between players such as Amarra, Decibel and Itunes. Actually this observation is not heavily discussed; most people can hear it. So clearly bit-perfect alone is not enough to describe the quality of a digital audio player. When describing a DAC; bit-perfect is not a point of discussion, however another parameter called ‘jitter’ is (check wiki for background on jitter).