In 1967, Ampex built its first prototype 16-track professional audio recorder at the request of Mirasound Studios in New York City. This unique machine was the first of its type and used reels of 2-inch tape on a modified tape transport system originally built for video recording. The album Everything Playing by The Lovin' Spoonful was recorded on 16-track at Mirasound and released in December 1967. Ampex introduced the 16-track production model MM-1000 in 1968, the first commercially available 16-track machine. Machines of this size are difficult to move and costly to maintain. Prices were very high, typically $10,000 to $30,000 U.S. dollars.