Kastle 2 / Citadel Wave Bard
Release Notes 

kastle2-wave-bard-1.6

Changes:
- fix USB descriptors (properly shows "Kastle 2 Wave Bard" on Windows, better overall Linux support)
- fix audio mix bug
- add support for sequencer length selection via web app
- small internal tweaks and cleanup

To check the firmware version:
• Boot into Test Mode: Hold the MODE button and turn the power ON.
• Listen to the Headphone Output / Audio Out directly: The unit will announce the firmware version via its voice output.
• Turn power OFF and ON to exit the test mode 

HOW TO UPDATE KASTLE 2
1) Connect the Kastle 2 with a USB-C cable to your computer
2) Turn OFF the power switch (left)
3) Hold SHIFT and turn ON the power switch (right)
4) Kastle 2 will boot into Update Mode (no sound)
5) Copy the firmware .uf2 file to the RPI-RP2 disk showing on your computer. 

HOW TO UPDATE CITADEL
1) Disconnect the Citadel module from your Eurorack power!
2) Connect the Citadel with a USB-C cable to your computer while holding the SHIFT button.
3) The Citadel will boot into Update Mode (no sound)
4) Copy the firmware .uf2 file to the RPI-RP2 disk showing on your computer. 

Note: Depending on the .uf2 firmware file size, the upload can usually take up to 2 minutes or more.