had developed their own line of tape recorders, named the Dynavox series. The company has built a variety of 2-track recorder models throughout its history for stereo recording. Some Studer model variations were sold under the Revox name, with slight modifications, at a lower price. The Revox variants were designed for consumer use, with features such as IR remote control, and the omission of balanced input/output sockets. The core circuitry of the two was otherwise substantially identical. One of the company's models was the Revox A77 recorder, which was introduced in 1967. Studer designed and produced multitrack recorders. Studer's first multi-track machine, the model J37, was released in 1964. It recorded 4 tracks on one inch tape. A pair of J37s were used by The Beatles to record Sgt. Pepper's Lonely Hearts Club Band in 1967. Later analog Studer machines were built in 8, 16, and 24-track configurations using tape widths of up to two inches. Sales of analog machines continued into the early 1990s, when they began to be replaced by digital recorders. In this period, Studer introduced the D820 and D827 multitrack models, which employed the Digital Audio Stationary Head standard. However, digital tape formats eventually fell out of favor with the introduction of computerized hard disk drive recording systems and software products such as Pro Tools. A Studer A800 MKIII is the focus of the opening shot of the video for the 1988 Guns N' Roses song "Patience". Some studios have continued to use Studer recorders to the present day. Mixing consoles In the mid-1990s Studer started to develop digital mixing consoles. After introduction of OnAir 2000 with Touch'n Action user interface in 1997, the D950 was the first digital large frame desk Studer introduced in 1998. With Vista Series (Vista 1, 5, 6, 7, 8, 9, V, and X) Studer launched in 2003 the Vistonics user interface with knobs-on-glass technology. Some Vista models have been discontinued including the Vista 5 but Vista 1, V, and X remain in production. Vista 5BE (Black Edition) was the final model of this series continuing the use of x86 CPU technology replacing SHARC based DSP engines but production on the 5BE was shelved as part of the discontinuation of the Vista 5 product family, the Vista 5BE being almost identical in function and operational features to the Vista V which continues to be produced by Evertz. The Studer Vista 9M2