VOCAL FUNCTION EXERCISES Joseph Stemple, Ph.D - Audio CD - For your patient's use this CD Audio provides the proper pitch targets for each vocal function exercise task. August 2006. 58 minutes. ISBN10: 1-59756-145-2 ISBN13: 978-1-59756-145-7. Audio CD US$29.95 CAN$34.00 £19.00 AU$47.00