I've had the Delfina crash at random because the library is generally buggy, but I've never had it crash due to high bitrates. The audio just stutters.
The one crash that I can reproduce with 100% reliability is changing tracks in Amplifier. If one track ends and Blanker is active (i.e., currently blanking the screen) it almost always crashes. Not sure if it's an Amplifier bug or a Delfina bug, but my workaround was to run Amplifier from a script that first disables Blanker and then re-enables it when quitting.