What Bowls are Required to Complete the L2 Crystal Singing Bowl Course? Tony Nec June 12, 2018 01:03 Updated Follow You need a minimum of 3 bowls that enable both harmonious and dissonant intervals to be created. Related articles What are the requirements to complete the Crystal Singing Bowls Level 2 Course? Do you go as in depth into tibetan singing bowls in the multi instrument courses as you do the separate tibetan singing bowls course? Is there a pre-requisite for the Level 2 Diploma Course? What About Insurance? What is the course extension policy? Comments 0 comments Please sign in to leave a comment.