Boss releases SY-1000 system program Ver.1.20

April 1, 2025 · 1 sources

Boss released SY-1000 system program Ver.1.20 in April 2025, according to the update history on the SY-1000 support page¹. The release changes the AUTO OFF specification¹.

The values that can be set for AUTO OFF are now OFF, 20MIN and 10HRS, and the default value has been changed to 20 minutes¹. Boss notes that the AUTO OFF value cannot be set correctly when using BOSS TONE STUDIO for SY-1000 Ver.1.0.3 or lower¹.

The update is carried out over USB with the unit connected to a Windows or Mac computer with a USB 2.0 port¹. Boss instructs users to hold down the [WRITE] button while turning the power on, copy the file SY-1000_UPA_up.bin to the root directory of the SY-1000 drive, and press [WRITE] to start the update¹. The download is sy1000_sys_v120.zip¹. Boss warns that powering off during the update can leave the unit unable to start up in normal operating mode, requiring service¹.

To check the installed version, Boss says to hold down [EXIT] while turning the power on and continue holding until the SY-1000 logo appears; if the display shows Version 1.20 or later, there is no need to update¹.

Ver.1.20 follows Ver.1.10, released in October 2024, which improved ALT TUNE pitch detection and stability¹. Ver.1.09, from December 2023, was a bug-fix release covering items including ALT TUNE behavior after using the tuner, MIDI THRU looping when connected to BTS, and ASSIGN PC messages to more than one MIDI channel¹. Earlier entries in the update history date to January 2020¹.