MIDI connections are available on which component of the System 6000?

The mainframe of the TC Electronic System 6000 is equipped with MIDI connections, which allow it to communicate with other MIDI-enabled devices. These connections enable the system to send and receive MIDI messages, facilitating control over various parameters and functions within the System 6000. The mainframe is the core processing unit of the system, handling audio processing and effects, so having MIDI connectivity integrated directly into it is essential for synchronizing and controlling performance in a studio or live environment.

In contrast, other components like the Remote CPU, TC Icon, and External Controller serve different purposes. The Remote CPU primarily provides additional processing power and communication capabilities, while the TC Icon is more focused on user interface functions. External Controllers might offer hands-on control but do not inherently come with built-in MIDI connections for direct integration like the mainframe does. Therefore, the presence of MIDI connections on the mainframe is a crucial feature for expanding the System 6000's usability in a MIDI-equipped setup.