The audio hardware interface must be matched to the version of software being used. Digidesign currently offers three versions of their software, M-Powered, LE, and HD.
The M-Powered software is used with the line of M-Audio interface devices. M-Audio also offers a unique line of software that is compatible with their interfaces and a variety of hardware and software interfaces. Some of the M-Audio interface devices, for example, their Musical Instrument Digital Interface (MIDI) interfaces, will work with any version of the Pro Tools software.