Digidesign 422 audio interface 1991 - Light Grey

The Digidesign 442 I/O was an audio interface released in 1991 as part of the original Pro Tools system. Here are some key details about this interface:

• It was a quad interface, providing 4 input and 4 output channels.
• The full name was Digidesign 442 I/O (model number MH031).
• It offered 16-bit audio conversion.
• The interface worked with Digidesign's NuBus cards for Macintosh computers in the early 1990s.
• It supported 4 channels of phase synchronous 16-bit audio output.
• The 442 I/O was designed to work with either the 442 I/O interface or the ProMaster 20 Interface.
• It utilized DSP processing, specifically 2 Motorola 56001 processors.

This interface was part of Digidesign's early professional audio recording systems that helped establish Pro Tools as an industry standard digital audio workstation. The 442 I/O represented some of the first commercially available multi-channel digital audio interfaces for computer-based recording in the early 1990s.

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