Yeah, it looks like that is sold separately. It’s $79 right now, but they say it is only for systems bought before 2011 - if I’m reading it correctly.
If your firmware is at v2.0 or later, this effects expansion is already included with your hardware. To confirm your firmware version, press and hold the Edit/Back button to get to User Options. Scroll to Firmware Version and press SW1. Press the Edit/Back button a couple times to get back to the top level.
I guess that means the expansion is incorporated into the hardware interface in v2?
The Eleven Rack Editor seems to be free from Avid, with this caveat:
*Please note that the Eleven Rack Editor only works with Eleven Rack systems running Eleven Rack Expansion Pack (firmware version v2.0 or higher), requires a 64-bit operating system—Windows 8, Windows 7, or OS X 10.8 or later, and latest Eleven Rack drivers for your system.
[to OP] My advice is to see if the Eleven Rack drivers are compatible with your system and OS, and also works well with your main interface if you use one (and intend to piggyback).
The Eleven Rack was in use back in the Digidesign days, before AVID bought them out. It looks like they now brand it as AVID, so they must still be making new ones. It’s somewhat dated, though with the updates they seem to be keeping it current enough to be useful. Back in those days, a Digidesign interface was required with Pro Tools (kind of like it was a dongle) and you couldn’t use anything else. As of v9 they changed that and opened Pro Tools up to other interface mfr’s (for the Native platform). But Digidesign/AVID interfaces can be used with any other software as long as there is basic compatibility with your system. So to Boz’s question I don’t think there’s anything to worry about. You’d probably want to be able to use that ER Editor though.
It used to be that Eleven was the main Pro Tools stock amp sim plugin, so I think originally this hardware was supposed to be a complement to that (just for historical reference).
Just curious too - it says “Simultaneous I/O: Up to 8 channels”. I don’t see nearly that many inputs, so I’m assuming that has to be used in a chain with AES/EBU or something?