Home Theater Questions? Ask a Technician for Answers ASAP
Hi Malcolm and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, bear with us; re-confirm and post back with the complete model number of the "...cassette audio deck..."
Appreciate the additional information.
For playback purposes, have you considered / tried connecting the Pioneer's LINE OUTPUT (PLAY) jacks to any unused analog input audio jacks of the Denon using a pair of red & white RCA-to-RCA cable ?