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Adat

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ADAT is a magnetic tape format used for digital audio recording. It allows users to record eight digital audio tracks onto a single S-VHS tape. These tapes are the same ones used in consumer VCRs for home video. The term ADAT originally described this tape-based system. Later, the name also referred to hard disk recorders like the Alesis ADAT HD24. This technology was very important for the music industry. In 2004, it was inducted into the TECnology Hall of Fame. This honor recognized how ADAT began a revolution of affordable recording tools.

Victor XG180 S-VHS videocassette
Victor XG180 S-VHS videocassette

The mechanism of ADAT relies on digital data stored on magnetic tape. One standard S-VHS tape cartridge can hold eight separate tracks. A user can connect multiple machines together to expand their recording capacity. You can link up to 16 ADAT units to work as one system. This allows for the simultaneous recording of up to 128 tracks. All these tracks maintain sample-accurate timing across the entire system. This ensures that every part of the recording stays perfectly in sync.

There are different types of ADAT recording formats based on bit depth. The original ADAT and the ADAT XT use Type I recording. These models record 16 bits per sample. Later generations include the XT-20, the LX-20, and the M-20. These newer machines support Type II recording. Type II recording uses 20 bits per sample for higher quality. All these machines use the same high-quality S-VHS media. There is a specific rule for using these different types. You can play Type I tapes in a Type II machine. However, you cannot play Type II tapes in a Type I machine.

The history of ADAT began with the company Alesis. They first announced the first ADAT model in January 1991. This announcement happened at the NAMM Show in Anaheim, California. The first physical recorders began shipping to customers in early 1992. This was likely in February or March of that year. The low cost of these machines changed the music world. It helped lead to the rise of project studios during the 1990s. These were smaller, more affordable places for people to record music.

ADAT machines include several technical features to help musicians work. They can record at sample rates of 44.1 or 48 kHz. These are common rates used throughout the audio industry. Users can also control the pitch of the audio. This is done by varying the sample rate and the tape speed. The machines also feature locate points for the user. These points allow you to store sample-exact positions on the tape. This makes it very easy to find specific parts of a digital recording quickly.

To help with timing, ADAT uses auto play and auto record functions. These functions allow for a process called punch in/out. This means the machine starts or stops recording at predetermined points. It helps musicians avoid relying on human timing to hit the exact instant. For extra control, users can use external remote controls. The Alesis LRC, or Little Remote Control, is a small option. It attaches to the machine using a 1/4" tip/sleeve plug. It provides transport controls and the most common functions.

There is also a larger option known as the BRC, or Big Remote Control. The BRC includes many more features than the stand-alone ADAT machine provides. These tools allow for much more complex control over the recording process. By combining affordable tape media with digital precision, ADAT changed audio storage. It bridged the gap between professional studios and home recording. This system remains a significant part of the history of digital audio transport.

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File:Victor XG180 S-VHS videocassette.jpg
Victor XG180 S-VHS videocassette.jpg
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