It is my understanding that the delay is an artifact of both digitizing and DSP'ing the audio on the Mozart speaker and the latency from transmitting over NL/ethernet (and then decoding/DSP'ing on the receive end). For older speakers, there's already a "NL/ML delay box" which delays the ML audio to account for the processing time required on the NL side.  However, this doesn't work for ML sources with directly attached speakers because there is no way to delay the audio between the ML source and its directly connected speakers, only ML distributed audio is delayed. If I understand prior discussions on this topic, the ability to use Mozart speakers as "surround" speakers will require by-passing some of Mozart's internal audio engine processing to minimize the delay to avoid lip synching issues as well as software changes on the BV to also account for this, now minimized, delay.   I doubt if any of this is just API settings (at least until the underlying software supports this). I must say, it seems pretty cool of B&O to publish this API.