[jeronimo]

Originally Posted by superjetboy21

the input and output of the software is what limits the track count.

M-AUDIO - ProFire 2626 - High-Definition 26-in/26-out FireWire Audio Interface with Octane Preamp Technology

if you click the link, you will see at the bottom of the page that the I/O is limited to 18 inputs and 18 outputs for Pro Tools M-Powered 7.4

AFAIK there is a "bug" that let you use more than 18 i/o with the PFLB, there is people using 24i/o with no problems.