DAC Burn-In Question

I am burning in a new PS Audio Direct Stream DAC (glowingly reviewed in this month's TAS -- and rightly so) and as the review points out and as I am learning, it requires significant burn in.

Question: I am feeding the DS DAC from a Bryston BDP-1 digital transport, and DAC feeds into preamp. If I am listening to a tuner through the preamp while playing the DAC as it is connected to preamp, am I burning in the DAC? Or does the pre actually have to be set to the DAC input and then be pushing the signal out to the amp?

I do not have the technical knowledge to know the answer, but want to make sure I am not wasting my time. And BTW, even partially burned in, this DAC is something special. More on this when it is ripened.

Thx, Neal