BOSS releases GM-800 system program Ver.1.20

January 1, 2025 · 1 sources

BOSS released GM-800 system program Ver.1.20 in January 2025, according to the update history on the GM-800 updates and drivers page¹. The GM-800 is a guitar and bass synth processor, listed among the site's multi-effects pedals.

The update adds a GK Audio function¹. BOSS directs owners to update BOSS TONE STUDIO for GM-800 alongside the system program¹. PART HOLD has been added to TARGET in ASSIGN SETTING, modes have been added to the TUNER function, and the default value for Auto Off has been changed to 20 minutes¹. BOSS refers owners to the owner's manuals for information on the functions¹.

The same page lists earlier releases: Ver.1.10 in May 2024 added support for the BOSS GK5-KIT-G6, GK5-KIT-G7 and GK5-KIT-B, an OUTPUT MODE parameter to output the guitar or bass guitar's normal pickup sound input via the GK IN jack, and support for 7-string guitars with the GK5-KIT-G7 installed, and improved pitch detection and stability when playing¹. Ver.1.03 in July 2023 added support for BOSS TONE STUDIO for GM-800 and improved system stability¹.

The page also lists Ver.1.50, dated July 2026, which adds a TRACKING MODE to GK SETTING that BOSS says prioritizes responsiveness and reduces latency, improves system stability and fixes an issue with the unit's operations sometimes being disabled¹.

Installation requires a USB memory formatted on a GM-800, with the file "GM-800_UPA_up.bin" copied to the root directory¹. BOSS instructs owners to hold the [WRITE] button while turning the power on until "GM-800 UPDATER" appears, and warns against powering off during the update¹.