The Korg M1 is a music workstation and is known to be one of the best-selling keyboards of all time, outselling other famous keyboards at the time such as the Yamaha DX7 and Roland D-50. It was used by many video game musicians for their instrument samples. One of the more notable instruments on the Korg M1 is patch number 46, the slap bass. It is best known for being used in the Seinfeld theme, and has been used in many video games.
Later, Korg released the Korg T3, also known as a "Korg M1 on steroids". It functioned the same as the Korg M1 but contained twice the amount of instruments and features. Even with the T3 being a better version, the M1 kept selling up until 1994, after the T3 stopped being made.