Spring Awakening composer Duncan Sheik has been hospitalized in “critical but stable condition,” according to his family. A post on his Instagram Wednesday states that “Out of respect for Duncan and our family, we will not be sharing any further medical details at this time.” “We kindly ask for privacy during this incredibly difficult time and will provide updates when appropriate,” the statement continues. “Thank you for the continued love and support.” Sheik, 56, is also known for his 1996 debut song “Barely Breathing,” which led to a Grammy nomination for best male pop vocal performance in 1998. He has released nine studio albums. He…