TheorySing

TheorySing is a karaoke player and sing-along karaoke system invented in 1972 as the country's first, having collaboration with Muzu Technology Co. Ltd. It was released on November 1972. It's similar to Enter Tech's Magic Sing since 2001.

Versions

 * TheorySing (1972 original)
 * TheorySing 2 (1978)
 * TheorySing 3 (1981)
 * TheorySing 4 (1985)
 * TheorySing 5 (1990)
 * TheorySing 6 (1996)
 * TheorySing 7 HQ (2001)
 * TheorySing HQ 2 (2005, also known as TheorySing 8)
 * TheorySing HQ 3 (2009, also known as TheorySing 9)
 * TheorySing HQ 4 (2013, also known as TheorySing 10)
 * TheorySing X5 (2017, also known as TheorySing 11)