Which monitoring option is considered external when using CR PLAY?

The monitoring option considered external when using CR PLAY is the MDR. MDR, or monitoring devices for reference, are typically external to the main audio system and provide a separate means of monitoring the audio output. These devices can help you assess the sound quality independently from the main playback system, allowing for a clearer and more accurate evaluation of audio material.

In contrast, internal speakers, sound boards, and built-in monitors are components that are part of the primary system and therefore classify as internal monitoring solutions. Internal speakers and built-in monitors typically reflect the same sound processing as the main output, making it difficult to evaluate how the audio will sound on different playback systems. Sound boards are also part of the playback and mixing processes, and thus they do not constitute an independent external monitoring solution.