Multichannel audio formats require an attention to channels' correlations and sometimes special approach. In this workshop, we would like to continue the discussion started at AES Show 2025 in LA and show how you can use different measurement tools to avoid certain problems in the final mix. For example, the mutual influence between the upper and main beds in immersive layout or problems in the LFE channel and how to check the mix for the correlation issues outside the sweet spot.