CD-to-Cassette Adapter

A CD-to-cassette adapter is an inexpensive audio accessory normally used to play portable CD players in cars equipped with a stereo cassette player. The plug connects to the CD player's headphone jack, and the "tape" portion is inserted into the cassette player. The CD player output is passed through the adapter to the cassette player, which makes it audible via the car's sound system.

You can use this type of adapter to pass the Pianocorder control signal generated by your computer to the Pianocorder's cassette deck.