Having defined affordable recording throughout the '70s with a string of product hits, TASCAM's most legendary product line was yet to hatch. The company's ground-breaking work with multitrack cassette recorders was first set forth with the release of the TEAC 124 Syncaset in 1979, and carries on with digital Portastudios to this day. Marketed by TASCAM, the 124 used a Simul-Sync record/playback head to give many musicians their first "multitracking" experience, using cassette head technology sourced in TEAC's sound-on-sound days. Though not a pro unit, the 124 certainly laid the groundwork for what TASCAM was about to unleash on the world.