The 1982 Sony Walkman M-80 Micro-Cassette recorders supports metal tapes and has high quality stereo sound. The M-80 even has stereo AM/FM radio with built-in antenna. It comes in beautiful blue and red colors. Most Micro-cassette recorders were designed for recording speech such as voice memo, meetings and interviews. It is uncommon to see Micro-cassette recorders with stereo and metal tapes support. This looks like it was geared towards music recording and listening. I've tried recording some