GT-Pro

Published by christian on July 29, 2026July 29, 2026

BOSS GT-PRO is a rackmount guitar preamp and effects processor with dual COSM amp modeling and full MIDI control over its 400 patches.

A dual COSM engine lets any two of the 46 amp variations be combined, switched or panned within a single patch, with dynamic sensing that can switch channels in response to playing volume, and a Solo switch giving each amp model a companion lead tone. Each patch chains up to 15 effects blocks in any order, drawn from 44 effect categories.

The 400 patches are split into 200 fixed presets and 200 user locations, and MIDI In, Out and Thru plus USB allow full remote control and patch selection.

MIDIDeviceManager communicates with the GT-PRO directly over SysEx, building its complete Patch Library automatically — no file to download or import.