Firmware Version 2.1 (July 1, 2024)
Takes out success briefing upon start-up, lowers volume when on ground, rounds off ascent rate, fixes bug in metric mode on ascent.
SonoAlti_3V_Firmware_2_1.uf2

Flash Revealer: SonoAlti_3V_16MB_Flash_Revealer.uf2
Flash Eraser: SonoAlti_3V_Flash_Eraser.uf2
SonoAlti 3V Sounds: SonoAlti_3V_Sounds.zip