Can I remove the interactive transcript and slowed audio from assignments?

Yes! You have the option to remove the interactive transcript and listening speed button from the Basic Details screen when you are creating a written assignment. The default setting includes the interactive transcript in written assignments. Uncheck the box Allow students to view and download transcript? to remove the transcript from your student’s assignment view:

For quizzes, the default setting is to not include the interactive transcript on assignments. Simply check the Include Listening Supports box to add the transcript to assignments.